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Finding the Fourth Proportional to 881.94, 1,216.97 and 508.90

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Solution

The fourth proportional to 881.94, 1,216.97 and 508.90 is: 702.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.94 : 1,216.97 = 508.90 : x
  2. Step 2: Convert to fraction form
    881.94/1,216.97 = 508.90/x
  3. Step 3: Cross multiply
    881.94x = 1,216.97 × 508.90
  4. Step 4: Simplify right side
    881.94x = 619,312.36
  5. Step 5: Solve for x
    x = 619,312.36/881.94
  6. Step 6: Final answer
    x = 702.22

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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.