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Finding the Fourth Proportional to 410.56, 615.12 and 312.88

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Solution

The fourth proportional to 410.56, 615.12 and 312.88 is: 468.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.56 : 615.12 = 312.88 : x
  2. Step 2: Convert to fraction form
    410.56/615.12 = 312.88/x
  3. Step 3: Cross multiply
    410.56x = 615.12 × 312.88
  4. Step 4: Simplify right side
    410.56x = 192,458.75
  5. Step 5: Solve for x
    x = 192,458.75/410.56
  6. Step 6: Final answer
    x = 468.77

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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.