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Finding the Fourth Proportional to 425,909.30, 638,725.66 and 141,523.47

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Solution

The fourth proportional to 425,909.30, 638,725.66 and 141,523.47 is: 212,239.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,909.30 : 638,725.66 = 141,523.47 : x
  2. Step 2: Convert to fraction form
    425,909.30/638,725.66 = 141,523.47/x
  3. Step 3: Cross multiply
    425,909.30x = 638,725.66 × 141,523.47
  4. Step 4: Simplify right side
    425,909.30x = 90,394,671,427.43
  5. Step 5: Solve for x
    x = 90,394,671,427.43/425,909.30
  6. Step 6: Final answer
    x = 212,239.25

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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.