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Finding the Fourth Proportional to 386,366.30, 579,549.45 and 218,404.70

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Solution

The fourth proportional to 386,366.30, 579,549.45 and 218,404.70 is: 327,607.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,366.30 : 579,549.45 = 218,404.70 : x
  2. Step 2: Convert to fraction form
    386,366.30/579,549.45 = 218,404.70/x
  3. Step 3: Cross multiply
    386,366.30x = 579,549.45 × 218,404.70
  4. Step 4: Simplify right side
    386,366.30x = 126,576,323,762.42
  5. Step 5: Solve for x
    x = 126,576,323,762.42/386,366.30
  6. Step 6: Final answer
    x = 327,607.05

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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.