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Finding the Fourth Proportional to 1,323.80, 1,829.22 and 1,281.08

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Solution

The fourth proportional to 1,323.80, 1,829.22 and 1,281.08 is: 1,770.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.80 : 1,829.22 = 1,281.08 : x
  2. Step 2: Convert to fraction form
    1,323.80/1,829.22 = 1,281.08/x
  3. Step 3: Cross multiply
    1,323.80x = 1,829.22 × 1,281.08
  4. Step 4: Simplify right side
    1,323.80x = 2,343,377.16
  5. Step 5: Solve for x
    x = 2,343,377.16/1,323.80
  6. Step 6: Final answer
    x = 1,770.19

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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.