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Finding the Fourth Proportional to 1,416.78, 2,125.21 and 676.47

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Solution

The fourth proportional to 1,416.78, 2,125.21 and 676.47 is: 1,014.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.78 : 2,125.21 = 676.47 : x
  2. Step 2: Convert to fraction form
    1,416.78/2,125.21 = 676.47/x
  3. Step 3: Cross multiply
    1,416.78x = 2,125.21 × 676.47
  4. Step 4: Simplify right side
    1,416.78x = 1,437,640.81
  5. Step 5: Solve for x
    x = 1,437,640.81/1,416.78
  6. Step 6: Final answer
    x = 1,014.72

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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.