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Finding the Fourth Proportional to 317.77, 476.49 and 155.32

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Solution

The fourth proportional to 317.77, 476.49 and 155.32 is: 232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.77 : 476.49 = 155.32 : x
  2. Step 2: Convert to fraction form
    317.77/476.49 = 155.32/x
  3. Step 3: Cross multiply
    317.77x = 476.49 × 155.32
  4. Step 4: Simplify right side
    317.77x = 74,008.43
  5. Step 5: Solve for x
    x = 74,008.43/317.77
  6. Step 6: Final answer
    x = 232.90

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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.