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Finding the Fourth Proportional to 1,281.73, 1,768.54 and 750.58

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Solution

The fourth proportional to 1,281.73, 1,768.54 and 750.58 is: 1,035.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.73 : 1,768.54 = 750.58 : x
  2. Step 2: Convert to fraction form
    1,281.73/1,768.54 = 750.58/x
  3. Step 3: Cross multiply
    1,281.73x = 1,768.54 × 750.58
  4. Step 4: Simplify right side
    1,281.73x = 1,327,432.63
  5. Step 5: Solve for x
    x = 1,327,432.63/1,281.73
  6. Step 6: Final answer
    x = 1,035.66

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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.