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Finding the Fourth Proportional to 458.80, 687.30 and 227.02

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Solution

The fourth proportional to 458.80, 687.30 and 227.02 is: 340.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.80 : 687.30 = 227.02 : x
  2. Step 2: Convert to fraction form
    458.80/687.30 = 227.02/x
  3. Step 3: Cross multiply
    458.80x = 687.30 × 227.02
  4. Step 4: Simplify right side
    458.80x = 156,030.85
  5. Step 5: Solve for x
    x = 156,030.85/458.80
  6. Step 6: Final answer
    x = 340.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.