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Finding the Fourth Proportional to 488,331.40, 732,497.10 and 405,387.40

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Solution

The fourth proportional to 488,331.40, 732,497.10 and 405,387.40 is: 608,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,331.40 : 732,497.10 = 405,387.40 : x
  2. Step 2: Convert to fraction form
    488,331.40/732,497.10 = 405,387.40/x
  3. Step 3: Cross multiply
    488,331.40x = 732,497.10 × 405,387.40
  4. Step 4: Simplify right side
    488,331.40x = 296,945,094,876.54
  5. Step 5: Solve for x
    x = 296,945,094,876.54/488,331.40
  6. Step 6: Final answer
    x = 608,081.10

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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.