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Finding the Fourth Proportional to 877.07, 1,315.96 and 863.25

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Solution

The fourth proportional to 877.07, 1,315.96 and 863.25 is: 1,295.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.07 : 1,315.96 = 863.25 : x
  2. Step 2: Convert to fraction form
    877.07/1,315.96 = 863.25/x
  3. Step 3: Cross multiply
    877.07x = 1,315.96 × 863.25
  4. Step 4: Simplify right side
    877.07x = 1,136,002.47
  5. Step 5: Solve for x
    x = 1,136,002.47/877.07
  6. Step 6: Final answer
    x = 1,295.22

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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.