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Finding the Fourth Proportional to 1,323.27, 1,985.45 and 891.27

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Solution

The fourth proportional to 1,323.27, 1,985.45 and 891.27 is: 1,337.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.27 : 1,985.45 = 891.27 : x
  2. Step 2: Convert to fraction form
    1,323.27/1,985.45 = 891.27/x
  3. Step 3: Cross multiply
    1,323.27x = 1,985.45 × 891.27
  4. Step 4: Simplify right side
    1,323.27x = 1,769,567.57
  5. Step 5: Solve for x
    x = 1,769,567.57/1,323.27
  6. Step 6: Final answer
    x = 1,337.27

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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.