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Finding the Fourth Proportional to 877.61, 1,210.42 and 566.57

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Solution

The fourth proportional to 877.61, 1,210.42 and 566.57 is: 781.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.61 : 1,210.42 = 566.57 : x
  2. Step 2: Convert to fraction form
    877.61/1,210.42 = 566.57/x
  3. Step 3: Cross multiply
    877.61x = 1,210.42 × 566.57
  4. Step 4: Simplify right side
    877.61x = 685,787.66
  5. Step 5: Solve for x
    x = 685,787.66/877.61
  6. Step 6: Final answer
    x = 781.43

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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.