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Finding the Fourth Proportional to 475.03, 655.55 and 288.49

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Solution

The fourth proportional to 475.03, 655.55 and 288.49 is: 398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.03 : 655.55 = 288.49 : x
  2. Step 2: Convert to fraction form
    475.03/655.55 = 288.49/x
  3. Step 3: Cross multiply
    475.03x = 655.55 × 288.49
  4. Step 4: Simplify right side
    475.03x = 189,114.90
  5. Step 5: Solve for x
    x = 189,114.90/475.03
  6. Step 6: Final answer
    x = 398.12

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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.