Home / 739,685.70-1,109,528.55-420,821.10

Finding the Fourth Proportional to 739,685.70, 1,109,528.55 and 420,821.10

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Solution

The fourth proportional to 739,685.70, 1,109,528.55 and 420,821.10 is: 631,231.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,685.70 : 1,109,528.55 = 420,821.10 : x
  2. Step 2: Convert to fraction form
    739,685.70/1,109,528.55 = 420,821.10/x
  3. Step 3: Cross multiply
    739,685.70x = 1,109,528.55 × 420,821.10
  4. Step 4: Simplify right side
    739,685.70x = 466,913,024,892.41
  5. Step 5: Solve for x
    x = 466,913,024,892.41/739,685.70
  6. Step 6: Final answer
    x = 631,231.65

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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.