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Finding the Fourth Proportional to 463.96, 696.40 and 317.72

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Solution

The fourth proportional to 463.96, 696.40 and 317.72 is: 476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.96 : 696.40 = 317.72 : x
  2. Step 2: Convert to fraction form
    463.96/696.40 = 317.72/x
  3. Step 3: Cross multiply
    463.96x = 696.40 × 317.72
  4. Step 4: Simplify right side
    463.96x = 221,261.15
  5. Step 5: Solve for x
    x = 221,261.15/463.96
  6. Step 6: Final answer
    x = 476.90

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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.