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Finding the Fourth Proportional to 475.77, 656.67 and 279.30

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Solution

The fourth proportional to 475.77, 656.67 and 279.30 is: 385.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.77 : 656.67 = 279.30 : x
  2. Step 2: Convert to fraction form
    475.77/656.67 = 279.30/x
  3. Step 3: Cross multiply
    475.77x = 656.67 × 279.30
  4. Step 4: Simplify right side
    475.77x = 183,407.93
  5. Step 5: Solve for x
    x = 183,407.93/475.77
  6. Step 6: Final answer
    x = 385.50

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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.