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Finding the Fourth Proportional to 406,925.92, 561,555 and 225,637.76

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Solution

The fourth proportional to 406,925.92, 561,555 and 225,637.76 is: 311,378.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,925.92 : 561,555 = 225,637.76 : x
  2. Step 2: Convert to fraction form
    406,925.92/561,555 = 225,637.76/x
  3. Step 3: Cross multiply
    406,925.92x = 561,555 × 225,637.76
  4. Step 4: Simplify right side
    406,925.92x = 126,708,012,316.80
  5. Step 5: Solve for x
    x = 126,708,012,316.80/406,925.92
  6. Step 6: Final answer
    x = 311,378.57

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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.