Home / 809,345.70-1,214,018.55-431,432.10

Finding the Fourth Proportional to 809,345.70, 1,214,018.55 and 431,432.10

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Solution

The fourth proportional to 809,345.70, 1,214,018.55 and 431,432.10 is: 647,148.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,345.70 : 1,214,018.55 = 431,432.10 : x
  2. Step 2: Convert to fraction form
    809,345.70/1,214,018.55 = 431,432.10/x
  3. Step 3: Cross multiply
    809,345.70x = 1,214,018.55 × 431,432.10
  4. Step 4: Simplify right side
    809,345.70x = 523,766,572,465.46
  5. Step 5: Solve for x
    x = 523,766,572,465.46/809,345.70
  6. Step 6: Final answer
    x = 647,148.15

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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.