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Finding the Fourth Proportional to 475.24, 655.94 and 317.88

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Solution

The fourth proportional to 475.24, 655.94 and 317.88 is: 438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.24 : 655.94 = 317.88 : x
  2. Step 2: Convert to fraction form
    475.24/655.94 = 317.88/x
  3. Step 3: Cross multiply
    475.24x = 655.94 × 317.88
  4. Step 4: Simplify right side
    475.24x = 208,510.21
  5. Step 5: Solve for x
    x = 208,510.21/475.24
  6. Step 6: Final answer
    x = 438.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.