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Finding the Fourth Proportional to 1,010.45, 1,393.92 and 616.79

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Solution

The fourth proportional to 1,010.45, 1,393.92 and 616.79 is: 850.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.45 : 1,393.92 = 616.79 : x
  2. Step 2: Convert to fraction form
    1,010.45/1,393.92 = 616.79/x
  3. Step 3: Cross multiply
    1,010.45x = 1,393.92 × 616.79
  4. Step 4: Simplify right side
    1,010.45x = 859,748.95
  5. Step 5: Solve for x
    x = 859,748.95/1,010.45
  6. Step 6: Final answer
    x = 850.86

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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.