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Finding the Fourth Proportional to 881.61, 1,216.79 and 508.83

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Solution

The fourth proportional to 881.61, 1,216.79 and 508.83 is: 702.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.61 : 1,216.79 = 508.83 : x
  2. Step 2: Convert to fraction form
    881.61/1,216.79 = 508.83/x
  3. Step 3: Cross multiply
    881.61x = 1,216.79 × 508.83
  4. Step 4: Simplify right side
    881.61x = 619,139.26
  5. Step 5: Solve for x
    x = 619,139.26/881.61
  6. Step 6: Final answer
    x = 702.28

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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.