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Finding the Fourth Proportional to 406,988.66, 561,645.96 and 225,717.42

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Solution

The fourth proportional to 406,988.66, 561,645.96 and 225,717.42 is: 311,490.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,988.66 : 561,645.96 = 225,717.42 : x
  2. Step 2: Convert to fraction form
    406,988.66/561,645.96 = 225,717.42/x
  3. Step 3: Cross multiply
    406,988.66x = 561,645.96 × 225,717.42
  4. Step 4: Simplify right side
    406,988.66x = 126,773,277,044.62
  5. Step 5: Solve for x
    x = 126,773,277,044.62/406,988.66
  6. Step 6: Final answer
    x = 311,490.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.