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Finding the Fourth Proportional to 1,262.73, 1,893.46 and 742.89

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Solution

The fourth proportional to 1,262.73, 1,893.46 and 742.89 is: 1,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.73 : 1,893.46 = 742.89 : x
  2. Step 2: Convert to fraction form
    1,262.73/1,893.46 = 742.89/x
  3. Step 3: Cross multiply
    1,262.73x = 1,893.46 × 742.89
  4. Step 4: Simplify right side
    1,262.73x = 1,406,632.50
  5. Step 5: Solve for x
    x = 1,406,632.50/1,262.73
  6. Step 6: Final answer
    x = 1,113.96

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1.5x scale

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.