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Finding the Fourth Proportional to 910.57, 1,256.61 and 537.51

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Solution

The fourth proportional to 910.57, 1,256.61 and 537.51 is: 741.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.57 : 1,256.61 = 537.51 : x
  2. Step 2: Convert to fraction form
    910.57/1,256.61 = 537.51/x
  3. Step 3: Cross multiply
    910.57x = 1,256.61 × 537.51
  4. Step 4: Simplify right side
    910.57x = 675,437.75
  5. Step 5: Solve for x
    x = 675,437.75/910.57
  6. Step 6: Final answer
    x = 741.78

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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.