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Finding the Fourth Proportional to 317.57, 476.66 and 310.05

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Solution

The fourth proportional to 317.57, 476.66 and 310.05 is: 465.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.57 : 476.66 = 310.05 : x
  2. Step 2: Convert to fraction form
    317.57/476.66 = 310.05/x
  3. Step 3: Cross multiply
    317.57x = 476.66 × 310.05
  4. Step 4: Simplify right side
    317.57x = 147,789.68
  5. Step 5: Solve for x
    x = 147,789.68/317.57
  6. Step 6: Final answer
    x = 465.38

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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.