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Finding the Fourth Proportional to 1,283.08, 1,770.50 and 731.08

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Solution

The fourth proportional to 1,283.08, 1,770.50 and 731.08 is: 1,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.08 : 1,770.50 = 731.08 : x
  2. Step 2: Convert to fraction form
    1,283.08/1,770.50 = 731.08/x
  3. Step 3: Cross multiply
    1,283.08x = 1,770.50 × 731.08
  4. Step 4: Simplify right side
    1,283.08x = 1,294,377.14
  5. Step 5: Solve for x
    x = 1,294,377.14/1,283.08
  6. Step 6: Final answer
    x = 1,008.80

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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.