Home / 669,309.20-1,002,214.20-431,363.60

Finding the Fourth Proportional to 669,309.20, 1,002,214.20 and 431,363.60

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Solution

The fourth proportional to 669,309.20, 1,002,214.20 and 431,363.60 is: 645,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,309.20 : 1,002,214.20 = 431,363.60 : x
  2. Step 2: Convert to fraction form
    669,309.20/1,002,214.20 = 431,363.60/x
  3. Step 3: Cross multiply
    669,309.20x = 1,002,214.20 × 431,363.60
  4. Step 4: Simplify right side
    669,309.20x = 432,318,725,283.12
  5. Step 5: Solve for x
    x = 432,318,725,283.12/669,309.20
  6. Step 6: Final answer
    x = 645,917.80

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Half scale
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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.