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Finding the Fourth Proportional to 317.72, 477.65 and 253.52

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Solution

The fourth proportional to 317.72, 477.65 and 253.52 is: 381.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.72 : 477.65 = 253.52 : x
  2. Step 2: Convert to fraction form
    317.72/477.65 = 253.52/x
  3. Step 3: Cross multiply
    317.72x = 477.65 × 253.52
  4. Step 4: Simplify right side
    317.72x = 121,090.17
  5. Step 5: Solve for x
    x = 121,090.17/317.72
  6. Step 6: Final answer
    x = 381.13

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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.