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Finding the Fourth Proportional to 457,868.80, 686,803.20 and 205,148.80

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Solution

The fourth proportional to 457,868.80, 686,803.20 and 205,148.80 is: 307,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,868.80 : 686,803.20 = 205,148.80 : x
  2. Step 2: Convert to fraction form
    457,868.80/686,803.20 = 205,148.80/x
  3. Step 3: Cross multiply
    457,868.80x = 686,803.20 × 205,148.80
  4. Step 4: Simplify right side
    457,868.80x = 140,896,852,316.16
  5. Step 5: Solve for x
    x = 140,896,852,316.16/457,868.80
  6. Step 6: Final answer
    x = 307,723.20

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Similar ratio
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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.