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Finding the Fourth Proportional to 628,862.40, 943,293.60 and 208,180.80

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Solution

The fourth proportional to 628,862.40, 943,293.60 and 208,180.80 is: 312,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,862.40 : 943,293.60 = 208,180.80 : x
  2. Step 2: Convert to fraction form
    628,862.40/943,293.60 = 208,180.80/x
  3. Step 3: Cross multiply
    628,862.40x = 943,293.60 × 208,180.80
  4. Step 4: Simplify right side
    628,862.40x = 196,375,616,282.88
  5. Step 5: Solve for x
    x = 196,375,616,282.88/628,862.40
  6. Step 6: Final answer
    x = 312,271.20

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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.