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Finding the Fourth Proportional to 475.99, 656.89 and 289.45

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Solution

The fourth proportional to 475.99, 656.89 and 289.45 is: 399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.99 : 656.89 = 289.45 : x
  2. Step 2: Convert to fraction form
    475.99/656.89 = 289.45/x
  3. Step 3: Cross multiply
    475.99x = 656.89 × 289.45
  4. Step 4: Simplify right side
    475.99x = 190,132.08
  5. Step 5: Solve for x
    x = 190,132.08/475.99
  6. Step 6: Final answer
    x = 399.45

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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.