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Finding the Fourth Proportional to 1,117.27, 1,675.90 and 874

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Solution

The fourth proportional to 1,117.27, 1,675.90 and 874 is: 1,311.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.27 : 1,675.90 = 874 : x
  2. Step 2: Convert to fraction form
    1,117.27/1,675.90 = 874/x
  3. Step 3: Cross multiply
    1,117.27x = 1,675.90 × 874
  4. Step 4: Simplify right side
    1,117.27x = 1,464,736.60
  5. Step 5: Solve for x
    x = 1,464,736.60/1,117.27
  6. Step 6: Final answer
    x = 1,311.00

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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.