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Finding the Fourth Proportional to 955.91, 1,319.22 and 625.23

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Solution

The fourth proportional to 955.91, 1,319.22 and 625.23 is: 862.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.91 : 1,319.22 = 625.23 : x
  2. Step 2: Convert to fraction form
    955.91/1,319.22 = 625.23/x
  3. Step 3: Cross multiply
    955.91x = 1,319.22 × 625.23
  4. Step 4: Simplify right side
    955.91x = 824,815.92
  5. Step 5: Solve for x
    x = 824,815.92/955.91
  6. Step 6: Final answer
    x = 862.86

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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.