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Finding the Fourth Proportional to 317.40, 476.04 and 134.72

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Solution

The fourth proportional to 317.40, 476.04 and 134.72 is: 202.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.40 : 476.04 = 134.72 : x
  2. Step 2: Convert to fraction form
    317.40/476.04 = 134.72/x
  3. Step 3: Cross multiply
    317.40x = 476.04 × 134.72
  4. Step 4: Simplify right side
    317.40x = 64,132.11
  5. Step 5: Solve for x
    x = 64,132.11/317.40
  6. Step 6: Final answer
    x = 202.05

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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.