Home / 912,905.40-1,369,358.10-487,752.60

Finding the Fourth Proportional to 912,905.40, 1,369,358.10 and 487,752.60

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Solution

The fourth proportional to 912,905.40, 1,369,358.10 and 487,752.60 is: 731,628.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,905.40 : 1,369,358.10 = 487,752.60 : x
  2. Step 2: Convert to fraction form
    912,905.40/1,369,358.10 = 487,752.60/x
  3. Step 3: Cross multiply
    912,905.40x = 1,369,358.10 × 487,752.60
  4. Step 4: Simplify right side
    912,905.40x = 667,907,973,606.06
  5. Step 5: Solve for x
    x = 667,907,973,606.06/912,905.40
  6. Step 6: Final answer
    x = 731,628.90

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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.