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Finding the Fourth Proportional to 512.64, 767.70 and 317.16

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Solution

The fourth proportional to 512.64, 767.70 and 317.16 is: 474.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.64 : 767.70 = 317.16 : x
  2. Step 2: Convert to fraction form
    512.64/767.70 = 317.16/x
  3. Step 3: Cross multiply
    512.64x = 767.70 × 317.16
  4. Step 4: Simplify right side
    512.64x = 243,483.73
  5. Step 5: Solve for x
    x = 243,483.73/512.64
  6. Step 6: Final answer
    x = 474.96

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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.