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Finding the Fourth Proportional to 1,199.80, 1,655.61 and 885.23

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Solution

The fourth proportional to 1,199.80, 1,655.61 and 885.23 is: 1,221.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.80 : 1,655.61 = 885.23 : x
  2. Step 2: Convert to fraction form
    1,199.80/1,655.61 = 885.23/x
  3. Step 3: Cross multiply
    1,199.80x = 1,655.61 × 885.23
  4. Step 4: Simplify right side
    1,199.80x = 1,465,595.64
  5. Step 5: Solve for x
    x = 1,465,595.64/1,199.80
  6. Step 6: Final answer
    x = 1,221.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.