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Finding the Fourth Proportional to 910.26, 1,262.61 and 877.46

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Solution

The fourth proportional to 910.26, 1,262.61 and 877.46 is: 1,217.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.26 : 1,262.61 = 877.46 : x
  2. Step 2: Convert to fraction form
    910.26/1,262.61 = 877.46/x
  3. Step 3: Cross multiply
    910.26x = 1,262.61 × 877.46
  4. Step 4: Simplify right side
    910.26x = 1,107,883.46
  5. Step 5: Solve for x
    x = 1,107,883.46/910.26
  6. Step 6: Final answer
    x = 1,217.11

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.