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Finding the Fourth Proportional to 372,409.20, 558,613.80 and 239,439.60

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Solution

The fourth proportional to 372,409.20, 558,613.80 and 239,439.60 is: 359,159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,409.20 : 558,613.80 = 239,439.60 : x
  2. Step 2: Convert to fraction form
    372,409.20/558,613.80 = 239,439.60/x
  3. Step 3: Cross multiply
    372,409.20x = 558,613.80 × 239,439.60
  4. Step 4: Simplify right side
    372,409.20x = 133,754,264,826.48
  5. Step 5: Solve for x
    x = 133,754,264,826.48/372,409.20
  6. Step 6: Final answer
    x = 359,159.40

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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.