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Finding the Fourth Proportional to 425,565.84, 638,494.50 and 145,279.92

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Solution

The fourth proportional to 425,565.84, 638,494.50 and 145,279.92 is: 217,969.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,565.84 : 638,494.50 = 145,279.92 : x
  2. Step 2: Convert to fraction form
    425,565.84/638,494.50 = 145,279.92/x
  3. Step 3: Cross multiply
    425,565.84x = 638,494.50 × 145,279.92
  4. Step 4: Simplify right side
    425,565.84x = 92,760,429,880.44
  5. Step 5: Solve for x
    x = 92,760,429,880.44/425,565.84
  6. Step 6: Final answer
    x = 217,969.63

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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.