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Finding the Fourth Proportional to 1,146.10, 1,719.80 and 708.42

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Solution

The fourth proportional to 1,146.10, 1,719.80 and 708.42 is: 1,063.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.10 : 1,719.80 = 708.42 : x
  2. Step 2: Convert to fraction form
    1,146.10/1,719.80 = 708.42/x
  3. Step 3: Cross multiply
    1,146.10x = 1,719.80 × 708.42
  4. Step 4: Simplify right side
    1,146.10x = 1,218,340.72
  5. Step 5: Solve for x
    x = 1,218,340.72/1,146.10
  6. Step 6: Final answer
    x = 1,063.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.