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Finding the Fourth Proportional to 1,125.91, 1,695.78 and 953.79

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Solution

The fourth proportional to 1,125.91, 1,695.78 and 953.79 is: 1,436.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.91 : 1,695.78 = 953.79 : x
  2. Step 2: Convert to fraction form
    1,125.91/1,695.78 = 953.79/x
  3. Step 3: Cross multiply
    1,125.91x = 1,695.78 × 953.79
  4. Step 4: Simplify right side
    1,125.91x = 1,617,418.01
  5. Step 5: Solve for x
    x = 1,617,418.01/1,125.91
  6. Step 6: Final answer
    x = 1,436.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.