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Finding the Fourth Proportional to 458.70, 687.80 and 227.51

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Solution

The fourth proportional to 458.70, 687.80 and 227.51 is: 341.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.70 : 687.80 = 227.51 : x
  2. Step 2: Convert to fraction form
    458.70/687.80 = 227.51/x
  3. Step 3: Cross multiply
    458.70x = 687.80 × 227.51
  4. Step 4: Simplify right side
    458.70x = 156,483.67
  5. Step 5: Solve for x
    x = 156,483.67/458.70
  6. Step 6: Final answer
    x = 341.15

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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.