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Finding the Fourth Proportional to 475.68, 656.51 and 289.25

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Solution

The fourth proportional to 475.68, 656.51 and 289.25 is: 399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.68 : 656.51 = 289.25 : x
  2. Step 2: Convert to fraction form
    475.68/656.51 = 289.25/x
  3. Step 3: Cross multiply
    475.68x = 656.51 × 289.25
  4. Step 4: Simplify right side
    475.68x = 189,890.79
  5. Step 5: Solve for x
    x = 189,890.79/475.68
  6. Step 6: Final answer
    x = 399.20

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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.