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Finding the Fourth Proportional to 475.04, 655.20 and 319.76

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Solution

The fourth proportional to 475.04, 655.20 and 319.76 is: 441.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.04 : 655.20 = 319.76 : x
  2. Step 2: Convert to fraction form
    475.04/655.20 = 319.76/x
  3. Step 3: Cross multiply
    475.04x = 655.20 × 319.76
  4. Step 4: Simplify right side
    475.04x = 209,506.75
  5. Step 5: Solve for x
    x = 209,506.75/475.04
  6. Step 6: Final answer
    x = 441.03

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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.