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Finding the Fourth Proportional to 957.08, 1,320.33 and 625.39

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Solution

The fourth proportional to 957.08, 1,320.33 and 625.39 is: 862.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.08 : 1,320.33 = 625.39 : x
  2. Step 2: Convert to fraction form
    957.08/1,320.33 = 625.39/x
  3. Step 3: Cross multiply
    957.08x = 1,320.33 × 625.39
  4. Step 4: Simplify right side
    957.08x = 825,717.88
  5. Step 5: Solve for x
    x = 825,717.88/957.08
  6. Step 6: Final answer
    x = 862.74

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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.