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Finding the Fourth Proportional to 903,646,948.60, 1,355,470,422.90 and 628,147,934.20

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Solution

The fourth proportional to 903,646,948.60, 1,355,470,422.90 and 628,147,934.20 is: 942,221,901.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,646,948.60 : 1,355,470,422.90 = 628,147,934.20 : x
  2. Step 2: Convert to fraction form
    903,646,948.60/1,355,470,422.90 = 628,147,934.20/x
  3. Step 3: Cross multiply
    903,646,948.60x = 1,355,470,422.90 × 628,147,934.20
  4. Step 4: Simplify right side
    903,646,948.60x = 851,435,946,013,835,520
  5. Step 5: Solve for x
    x = 851,435,946,013,835,520/903,646,948.60
  6. Step 6: Final answer
    x = 942,221,901.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.