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Finding the Fourth Proportional to 641,691.40, 963,483.28 and 357,936.34

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Solution

The fourth proportional to 641,691.40, 963,483.28 and 357,936.34 is: 537,432.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,691.40 : 963,483.28 = 357,936.34 : x
  2. Step 2: Convert to fraction form
    641,691.40/963,483.28 = 357,936.34/x
  3. Step 3: Cross multiply
    641,691.40x = 963,483.28 × 357,936.34
  4. Step 4: Simplify right side
    641,691.40x = 344,865,678,894.40
  5. Step 5: Solve for x
    x = 344,865,678,894.40/641,691.40
  6. Step 6: Final answer
    x = 537,432.29

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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.