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Finding the Fourth Proportional to 957.02, 1,319.94 and 878.58

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Solution

The fourth proportional to 957.02, 1,319.94 and 878.58 is: 1,211.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.02 : 1,319.94 = 878.58 : x
  2. Step 2: Convert to fraction form
    957.02/1,319.94 = 878.58/x
  3. Step 3: Cross multiply
    957.02x = 1,319.94 × 878.58
  4. Step 4: Simplify right side
    957.02x = 1,159,672.89
  5. Step 5: Solve for x
    x = 1,159,672.89/957.02
  6. Step 6: Final answer
    x = 1,211.76

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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.