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Finding the Fourth Proportional to 452,318.32, 681,728.70 and 389,891.90

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Solution

The fourth proportional to 452,318.32, 681,728.70 and 389,891.90 is: 587,640.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,318.32 : 681,728.70 = 389,891.90 : x
  2. Step 2: Convert to fraction form
    452,318.32/681,728.70 = 389,891.90/x
  3. Step 3: Cross multiply
    452,318.32x = 681,728.70 × 389,891.90
  4. Step 4: Simplify right side
    452,318.32x = 265,800,498,127.53
  5. Step 5: Solve for x
    x = 265,800,498,127.53/452,318.32
  6. Step 6: Final answer
    x = 587,640.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.