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Finding the Fourth Proportional to 392,687.20, 589,030.80 and 366,248.80

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Solution

The fourth proportional to 392,687.20, 589,030.80 and 366,248.80 is: 549,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,687.20 : 589,030.80 = 366,248.80 : x
  2. Step 2: Convert to fraction form
    392,687.20/589,030.80 = 366,248.80/x
  3. Step 3: Cross multiply
    392,687.20x = 589,030.80 × 366,248.80
  4. Step 4: Simplify right side
    392,687.20x = 215,731,823,663.04
  5. Step 5: Solve for x
    x = 215,731,823,663.04/392,687.20
  6. Step 6: Final answer
    x = 549,373.20

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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.