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Finding the Fourth Proportional to 1,275.45, 1,910.49 and 616.38

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Solution

The fourth proportional to 1,275.45, 1,910.49 and 616.38 is: 923.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.45 : 1,910.49 = 616.38 : x
  2. Step 2: Convert to fraction form
    1,275.45/1,910.49 = 616.38/x
  3. Step 3: Cross multiply
    1,275.45x = 1,910.49 × 616.38
  4. Step 4: Simplify right side
    1,275.45x = 1,177,587.83
  5. Step 5: Solve for x
    x = 1,177,587.83/1,275.45
  6. Step 6: Final answer
    x = 923.27

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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.