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Finding the Fourth Proportional to 458.76, 688.20 and 276.12

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Solution

The fourth proportional to 458.76, 688.20 and 276.12 is: 414.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.76 : 688.20 = 276.12 : x
  2. Step 2: Convert to fraction form
    458.76/688.20 = 276.12/x
  3. Step 3: Cross multiply
    458.76x = 688.20 × 276.12
  4. Step 4: Simplify right side
    458.76x = 190,025.78
  5. Step 5: Solve for x
    x = 190,025.78/458.76
  6. Step 6: Final answer
    x = 414.22

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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.