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Finding the Fourth Proportional to 317.37, 476.16 and 215.04

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Solution

The fourth proportional to 317.37, 476.16 and 215.04 is: 322.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.37 : 476.16 = 215.04 : x
  2. Step 2: Convert to fraction form
    317.37/476.16 = 215.04/x
  3. Step 3: Cross multiply
    317.37x = 476.16 × 215.04
  4. Step 4: Simplify right side
    317.37x = 102,393.45
  5. Step 5: Solve for x
    x = 102,393.45/317.37
  6. Step 6: Final answer
    x = 322.63

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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.