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Finding the Fourth Proportional to 390,757.64, 586,130.28 and 124,514.34

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Solution

The fourth proportional to 390,757.64, 586,130.28 and 124,514.34 is: 186,769.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,757.64 : 586,130.28 = 124,514.34 : x
  2. Step 2: Convert to fraction form
    390,757.64/586,130.28 = 124,514.34/x
  3. Step 3: Cross multiply
    390,757.64x = 586,130.28 × 124,514.34
  4. Step 4: Simplify right side
    390,757.64x = 72,981,622,303.30
  5. Step 5: Solve for x
    x = 72,981,622,303.30/390,757.64
  6. Step 6: Final answer
    x = 186,769.54

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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.