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Finding the Fourth Proportional to 1,095.11, 1,642.70 and 611.24

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Solution

The fourth proportional to 1,095.11, 1,642.70 and 611.24 is: 916.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.11 : 1,642.70 = 611.24 : x
  2. Step 2: Convert to fraction form
    1,095.11/1,642.70 = 611.24/x
  3. Step 3: Cross multiply
    1,095.11x = 1,642.70 × 611.24
  4. Step 4: Simplify right side
    1,095.11x = 1,004,080.89
  5. Step 5: Solve for x
    x = 1,004,080.89/1,095.11
  6. Step 6: Final answer
    x = 916.88

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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.