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Finding the Fourth Proportional to 877.25, 1,210.20 and 540.86

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Solution

The fourth proportional to 877.25, 1,210.20 and 540.86 is: 746.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.25 : 1,210.20 = 540.86 : x
  2. Step 2: Convert to fraction form
    877.25/1,210.20 = 540.86/x
  3. Step 3: Cross multiply
    877.25x = 1,210.20 × 540.86
  4. Step 4: Simplify right side
    877.25x = 654,542.72
  5. Step 5: Solve for x
    x = 654,542.72/877.25
  6. Step 6: Final answer
    x = 746.13

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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.