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Finding the Fourth Proportional to 643,047.15, 887,446.41 and 371,126.52

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Solution

The fourth proportional to 643,047.15, 887,446.41 and 371,126.52 is: 512,178.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,047.15 : 887,446.41 = 371,126.52 : x
  2. Step 2: Convert to fraction form
    643,047.15/887,446.41 = 371,126.52/x
  3. Step 3: Cross multiply
    643,047.15x = 887,446.41 × 371,126.52
  4. Step 4: Simplify right side
    643,047.15x = 329,354,897,829.79
  5. Step 5: Solve for x
    x = 329,354,897,829.79/643,047.15
  6. Step 6: Final answer
    x = 512,178.46

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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.