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Finding the Fourth Proportional to 317.52, 476.82 and 259.74

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Solution

The fourth proportional to 317.52, 476.82 and 259.74 is: 390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.52 : 476.82 = 259.74 : x
  2. Step 2: Convert to fraction form
    317.52/476.82 = 259.74/x
  3. Step 3: Cross multiply
    317.52x = 476.82 × 259.74
  4. Step 4: Simplify right side
    317.52x = 123,849.23
  5. Step 5: Solve for x
    x = 123,849.23/317.52
  6. Step 6: Final answer
    x = 390.05

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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.