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Finding the Fourth Proportional to 643,449.28, 887,817.16 and 371,458.12

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Solution

The fourth proportional to 643,449.28, 887,817.16 and 371,458.12 is: 512,529.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,449.28 : 887,817.16 = 371,458.12 : x
  2. Step 2: Convert to fraction form
    643,449.28/887,817.16 = 371,458.12/x
  3. Step 3: Cross multiply
    643,449.28x = 887,817.16 × 371,458.12
  4. Step 4: Simplify right side
    643,449.28x = 329,786,893,157.34
  5. Step 5: Solve for x
    x = 329,786,893,157.34/643,449.28
  6. Step 6: Final answer
    x = 512,529.74

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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.