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Finding the Fourth Proportional to 539,429.40, 807,761.70 and 398,424.60

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Solution

The fourth proportional to 539,429.40, 807,761.70 and 398,424.60 is: 596,615.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,429.40 : 807,761.70 = 398,424.60 : x
  2. Step 2: Convert to fraction form
    539,429.40/807,761.70 = 398,424.60/x
  3. Step 3: Cross multiply
    539,429.40x = 807,761.70 × 398,424.60
  4. Step 4: Simplify right side
    539,429.40x = 321,832,132,217.82
  5. Step 5: Solve for x
    x = 321,832,132,217.82/539,429.40
  6. Step 6: Final answer
    x = 596,615.85

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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.