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Finding the Fourth Proportional to 678,025.55, 935,672.31 and 372,106.88

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Solution

The fourth proportional to 678,025.55, 935,672.31 and 372,106.88 is: 513,505.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,025.55 : 935,672.31 = 372,106.88 : x
  2. Step 2: Convert to fraction form
    678,025.55/935,672.31 = 372,106.88/x
  3. Step 3: Cross multiply
    678,025.55x = 935,672.31 × 372,106.88
  4. Step 4: Simplify right side
    678,025.55x = 348,170,099,298.13
  5. Step 5: Solve for x
    x = 348,170,099,298.13/678,025.55
  6. Step 6: Final answer
    x = 513,505.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.