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Finding the Fourth Proportional to 389,439.20, 584,158.80 and 239,848.40

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Solution

The fourth proportional to 389,439.20, 584,158.80 and 239,848.40 is: 359,772.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,439.20 : 584,158.80 = 239,848.40 : x
  2. Step 2: Convert to fraction form
    389,439.20/584,158.80 = 239,848.40/x
  3. Step 3: Cross multiply
    389,439.20x = 584,158.80 × 239,848.40
  4. Step 4: Simplify right side
    389,439.20x = 140,109,553,525.92
  5. Step 5: Solve for x
    x = 140,109,553,525.92/389,439.20
  6. Step 6: Final answer
    x = 359,772.60

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Similar ratio
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1.5x scale

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.