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Finding the Fourth Proportional to 392,699.70, 589,049.55 and 366,261.30

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Solution

The fourth proportional to 392,699.70, 589,049.55 and 366,261.30 is: 549,391.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,699.70 : 589,049.55 = 366,261.30 : x
  2. Step 2: Convert to fraction form
    392,699.70/589,049.55 = 366,261.30/x
  3. Step 3: Cross multiply
    392,699.70x = 589,049.55 × 366,261.30
  4. Step 4: Simplify right side
    392,699.70x = 215,746,053,947.42
  5. Step 5: Solve for x
    x = 215,746,053,947.42/392,699.70
  6. Step 6: Final answer
    x = 549,391.95

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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.