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Finding the Fourth Proportional to 1,116.27, 1,674.40 and 873

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Solution

The fourth proportional to 1,116.27, 1,674.40 and 873 is: 1,309.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.27 : 1,674.40 = 873 : x
  2. Step 2: Convert to fraction form
    1,116.27/1,674.40 = 873/x
  3. Step 3: Cross multiply
    1,116.27x = 1,674.40 × 873
  4. Step 4: Simplify right side
    1,116.27x = 1,461,751.20
  5. Step 5: Solve for x
    x = 1,461,751.20/1,116.27
  6. Step 6: Final answer
    x = 1,309.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,117.27, 1,675.90 and 874
Similar ratio
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1.5x scale

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.