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Finding the Fourth Proportional to 877.07, 1,314.04 and 781.73

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Solution

The fourth proportional to 877.07, 1,314.04 and 781.73 is: 1,171.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.07 : 1,314.04 = 781.73 : x
  2. Step 2: Convert to fraction form
    877.07/1,314.04 = 781.73/x
  3. Step 3: Cross multiply
    877.07x = 1,314.04 × 781.73
  4. Step 4: Simplify right side
    877.07x = 1,027,224.49
  5. Step 5: Solve for x
    x = 1,027,224.49/877.07
  6. Step 6: Final answer
    x = 1,171.20

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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.