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Finding the Fourth Proportional to 397.68, 597.12 and 317.16

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Solution

The fourth proportional to 397.68, 597.12 and 317.16 is: 476.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.68 : 597.12 = 317.16 : x
  2. Step 2: Convert to fraction form
    397.68/597.12 = 317.16/x
  3. Step 3: Cross multiply
    397.68x = 597.12 × 317.16
  4. Step 4: Simplify right side
    397.68x = 189,382.58
  5. Step 5: Solve for x
    x = 189,382.58/397.68
  6. Step 6: Final answer
    x = 476.22

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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.