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Finding the Fourth Proportional to 1,014.88, 1,400.60 and 616.68

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Solution

The fourth proportional to 1,014.88, 1,400.60 and 616.68 is: 851.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.88 : 1,400.60 = 616.68 : x
  2. Step 2: Convert to fraction form
    1,014.88/1,400.60 = 616.68/x
  3. Step 3: Cross multiply
    1,014.88x = 1,400.60 × 616.68
  4. Step 4: Simplify right side
    1,014.88x = 863,722.01
  5. Step 5: Solve for x
    x = 863,722.01/1,014.88
  6. Step 6: Final answer
    x = 851.06

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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.