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Finding the Fourth Proportional to 407,587.17, 611,382.80 and 238,988.91

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Solution

The fourth proportional to 407,587.17, 611,382.80 and 238,988.91 is: 358,484.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,587.17 : 611,382.80 = 238,988.91 : x
  2. Step 2: Convert to fraction form
    407,587.17/611,382.80 = 238,988.91/x
  3. Step 3: Cross multiply
    407,587.17x = 611,382.80 × 238,988.91
  4. Step 4: Simplify right side
    407,587.17x = 146,113,707,769.80
  5. Step 5: Solve for x
    x = 146,113,707,769.80/407,587.17
  6. Step 6: Final answer
    x = 358,484.56

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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.