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Finding the Fourth Proportional to 475.34, 655.89 and 288.86

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Solution

The fourth proportional to 475.34, 655.89 and 288.86 is: 398.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.34 : 655.89 = 288.86 : x
  2. Step 2: Convert to fraction form
    475.34/655.89 = 288.86/x
  3. Step 3: Cross multiply
    475.34x = 655.89 × 288.86
  4. Step 4: Simplify right side
    475.34x = 189,460.39
  5. Step 5: Solve for x
    x = 189,460.39/475.34
  6. Step 6: Final answer
    x = 398.58

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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.