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Finding the Fourth Proportional to 910.73, 1,257.12 and 537.81

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Solution

The fourth proportional to 910.73, 1,257.12 and 537.81 is: 742.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.73 : 1,257.12 = 537.81 : x
  2. Step 2: Convert to fraction form
    910.73/1,257.12 = 537.81/x
  3. Step 3: Cross multiply
    910.73x = 1,257.12 × 537.81
  4. Step 4: Simplify right side
    910.73x = 676,091.71
  5. Step 5: Solve for x
    x = 676,091.71/910.73
  6. Step 6: Final answer
    x = 742.37

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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.