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Finding the Fourth Proportional to 390,602.72, 585,926.92 and 150,717.90

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Solution

The fourth proportional to 390,602.72, 585,926.92 and 150,717.90 is: 226,085.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,602.72 : 585,926.92 = 150,717.90 : x
  2. Step 2: Convert to fraction form
    390,602.72/585,926.92 = 150,717.90/x
  3. Step 3: Cross multiply
    390,602.72x = 585,926.92 × 150,717.90
  4. Step 4: Simplify right side
    390,602.72x = 88,309,674,935.87
  5. Step 5: Solve for x
    x = 88,309,674,935.87/390,602.72
  6. Step 6: Final answer
    x = 226,085.66

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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.