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Finding the Fourth Proportional to 643,125.80, 887,515.98 and 356,672.36

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Solution

The fourth proportional to 643,125.80, 887,515.98 and 356,672.36 is: 492,209.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,125.80 : 887,515.98 = 356,672.36 : x
  2. Step 2: Convert to fraction form
    643,125.80/887,515.98 = 356,672.36/x
  3. Step 3: Cross multiply
    643,125.80x = 887,515.98 × 356,672.36
  4. Step 4: Simplify right side
    643,125.80x = 316,552,419,124.31
  5. Step 5: Solve for x
    x = 316,552,419,124.31/643,125.80
  6. Step 6: Final answer
    x = 492,209.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.