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Finding the Fourth Proportional to 475.13, 655.85 and 340.72

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Solution

The fourth proportional to 475.13, 655.85 and 340.72 is: 470.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.13 : 655.85 = 340.72 : x
  2. Step 2: Convert to fraction form
    475.13/655.85 = 340.72/x
  3. Step 3: Cross multiply
    475.13x = 655.85 × 340.72
  4. Step 4: Simplify right side
    475.13x = 223,460.42
  5. Step 5: Solve for x
    x = 223,460.42/475.13
  6. Step 6: Final answer
    x = 470.31

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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.