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Finding the Fourth Proportional to 317.64, 476.46 and 144.30

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Solution

The fourth proportional to 317.64, 476.46 and 144.30 is: 216.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.64 : 476.46 = 144.30 : x
  2. Step 2: Convert to fraction form
    317.64/476.46 = 144.30/x
  3. Step 3: Cross multiply
    317.64x = 476.46 × 144.30
  4. Step 4: Simplify right side
    317.64x = 68,753.18
  5. Step 5: Solve for x
    x = 68,753.18/317.64
  6. Step 6: Final answer
    x = 216.45

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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.