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Finding the Fourth Proportional to 390,892.67, 586,345.18 and 154,233.30

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Solution

The fourth proportional to 390,892.67, 586,345.18 and 154,233.30 is: 231,352.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,892.67 : 586,345.18 = 154,233.30 : x
  2. Step 2: Convert to fraction form
    390,892.67/586,345.18 = 154,233.30/x
  3. Step 3: Cross multiply
    390,892.67x = 586,345.18 × 154,233.30
  4. Step 4: Simplify right side
    390,892.67x = 90,433,952,050.49
  5. Step 5: Solve for x
    x = 90,433,952,050.49/390,892.67
  6. Step 6: Final answer
    x = 231,352.39

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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.