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Finding the Fourth Proportional to 475.14, 655.61 and 278.63

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Solution

The fourth proportional to 475.14, 655.61 and 278.63 is: 384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.14 : 655.61 = 278.63 : x
  2. Step 2: Convert to fraction form
    475.14/655.61 = 278.63/x
  3. Step 3: Cross multiply
    475.14x = 655.61 × 278.63
  4. Step 4: Simplify right side
    475.14x = 182,667.94
  5. Step 5: Solve for x
    x = 182,667.94/475.14
  6. Step 6: Final answer
    x = 384.45

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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.