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Finding the Fourth Proportional to 641,369.71, 884,949.62 and 383,207.87

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Solution

The fourth proportional to 641,369.71, 884,949.62 and 383,207.87 is: 528,742.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,369.71 : 884,949.62 = 383,207.87 : x
  2. Step 2: Convert to fraction form
    641,369.71/884,949.62 = 383,207.87/x
  3. Step 3: Cross multiply
    641,369.71x = 884,949.62 × 383,207.87
  4. Step 4: Simplify right side
    641,369.71x = 339,119,659,233.84
  5. Step 5: Solve for x
    x = 339,119,659,233.84/641,369.71
  6. Step 6: Final answer
    x = 528,742.87

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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.