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Finding the Fourth Proportional to 957.69, 1,322.54 and 825.45

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Solution

The fourth proportional to 957.69, 1,322.54 and 825.45 is: 1,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.69 : 1,322.54 = 825.45 : x
  2. Step 2: Convert to fraction form
    957.69/1,322.54 = 825.45/x
  3. Step 3: Cross multiply
    957.69x = 1,322.54 × 825.45
  4. Step 4: Simplify right side
    957.69x = 1,091,686.52
  5. Step 5: Solve for x
    x = 1,091,686.52/957.69
  6. Step 6: Final answer
    x = 1,139.92

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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.