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Finding the Fourth Proportional to 425,948.76, 638,855.43 and 141,615.66

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Solution

The fourth proportional to 425,948.76, 638,855.43 and 141,615.66 is: 212,400.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,948.76 : 638,855.43 = 141,615.66 : x
  2. Step 2: Convert to fraction form
    425,948.76/638,855.43 = 141,615.66/x
  3. Step 3: Cross multiply
    425,948.76x = 638,855.43 × 141,615.66
  4. Step 4: Simplify right side
    425,948.76x = 90,471,933,364.03
  5. Step 5: Solve for x
    x = 90,471,933,364.03/425,948.76
  6. Step 6: Final answer
    x = 212,400.98

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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.