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Finding the Fourth Proportional to 426,295.32, 639,304.54 and 141,909.48

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Solution

The fourth proportional to 426,295.32, 639,304.54 and 141,909.48 is: 212,818.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,295.32 : 639,304.54 = 141,909.48 : x
  2. Step 2: Convert to fraction form
    426,295.32/639,304.54 = 141,909.48/x
  3. Step 3: Cross multiply
    426,295.32x = 639,304.54 × 141,909.48
  4. Step 4: Simplify right side
    426,295.32x = 90,723,374,833.04
  5. Step 5: Solve for x
    x = 90,723,374,833.04/426,295.32
  6. Step 6: Final answer
    x = 212,818.13

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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.