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Finding the Fourth Proportional to 317.66, 476.08 and 274.32

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Solution

The fourth proportional to 317.66, 476.08 and 274.32 is: 411.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.66 : 476.08 = 274.32 : x
  2. Step 2: Convert to fraction form
    317.66/476.08 = 274.32/x
  3. Step 3: Cross multiply
    317.66x = 476.08 × 274.32
  4. Step 4: Simplify right side
    317.66x = 130,600.39
  5. Step 5: Solve for x
    x = 130,600.39/317.66
  6. Step 6: Final answer
    x = 411.13

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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.