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Finding the Fourth Proportional to 390,244.56, 585,242.27 and 123,942.79

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Solution

The fourth proportional to 390,244.56, 585,242.27 and 123,942.79 is: 185,874.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,244.56 : 585,242.27 = 123,942.79 : x
  2. Step 2: Convert to fraction form
    390,244.56/585,242.27 = 123,942.79/x
  3. Step 3: Cross multiply
    390,244.56x = 585,242.27 × 123,942.79
  4. Step 4: Simplify right side
    390,244.56x = 72,536,556,223.81
  5. Step 5: Solve for x
    x = 72,536,556,223.81/390,244.56
  6. Step 6: Final answer
    x = 185,874.61

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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.