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Finding the Fourth Proportional to 390,757.60, 586,130 and 124,514.48

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Solution

The fourth proportional to 390,757.60, 586,130 and 124,514.48 is: 186,769.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,757.60 : 586,130 = 124,514.48 : x
  2. Step 2: Convert to fraction form
    390,757.60/586,130 = 124,514.48/x
  3. Step 3: Cross multiply
    390,757.60x = 586,130 × 124,514.48
  4. Step 4: Simplify right side
    390,757.60x = 72,981,672,162.40
  5. Step 5: Solve for x
    x = 72,981,672,162.40/390,757.60
  6. Step 6: Final answer
    x = 186,769.68

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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.