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Finding the Fourth Proportional to 418,967.46, 628,549.62 and 138,484.71

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Solution

The fourth proportional to 418,967.46, 628,549.62 and 138,484.71 is: 207,759.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,967.46 : 628,549.62 = 138,484.71 : x
  2. Step 2: Convert to fraction form
    418,967.46/628,549.62 = 138,484.71/x
  3. Step 3: Cross multiply
    418,967.46x = 628,549.62 × 138,484.71
  4. Step 4: Simplify right side
    418,967.46x = 87,044,511,846.31
  5. Step 5: Solve for x
    x = 87,044,511,846.31/418,967.46
  6. Step 6: Final answer
    x = 207,759.60

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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.