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Finding the Fourth Proportional to 957.22, 1,321.18 and 625.07

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Solution

The fourth proportional to 957.22, 1,321.18 and 625.07 is: 862.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.22 : 1,321.18 = 625.07 : x
  2. Step 2: Convert to fraction form
    957.22/1,321.18 = 625.07/x
  3. Step 3: Cross multiply
    957.22x = 1,321.18 × 625.07
  4. Step 4: Simplify right side
    957.22x = 825,831.72
  5. Step 5: Solve for x
    x = 825,831.72/957.22
  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.