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Finding the Fourth Proportional to 418,967.71, 628,550 and 138,484.96

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Solution

The fourth proportional to 418,967.71, 628,550 and 138,484.96 is: 207,759.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,967.71 : 628,550 = 138,484.96 : x
  2. Step 2: Convert to fraction form
    418,967.71/628,550 = 138,484.96/x
  3. Step 3: Cross multiply
    418,967.71x = 628,550 × 138,484.96
  4. Step 4: Simplify right side
    418,967.71x = 87,044,721,608
  5. Step 5: Solve for x
    x = 87,044,721,608/418,967.71
  6. Step 6: Final answer
    x = 207,759.98

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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.