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Finding the Fourth Proportional to 957.56, 1,318.19 and 859.28

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Solution

The fourth proportional to 957.56, 1,318.19 and 859.28 is: 1,182.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.56 : 1,318.19 = 859.28 : x
  2. Step 2: Convert to fraction form
    957.56/1,318.19 = 859.28/x
  3. Step 3: Cross multiply
    957.56x = 1,318.19 × 859.28
  4. Step 4: Simplify right side
    957.56x = 1,132,699.75
  5. Step 5: Solve for x
    x = 1,132,699.75/957.56
  6. Step 6: Final answer
    x = 1,182.90

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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.