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Finding the Fourth Proportional to 641,434.32, 885,119.24 and 383,259.88

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Solution

The fourth proportional to 641,434.32, 885,119.24 and 383,259.88 is: 528,862.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,434.32 : 885,119.24 = 383,259.88 : x
  2. Step 2: Convert to fraction form
    641,434.32/885,119.24 = 383,259.88/x
  3. Step 3: Cross multiply
    641,434.32x = 885,119.24 × 383,259.88
  4. Step 4: Simplify right side
    641,434.32x = 339,230,693,708.09
  5. Step 5: Solve for x
    x = 339,230,693,708.09/641,434.32
  6. Step 6: Final answer
    x = 528,862.71

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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.