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Finding the Fourth Proportional to 881.25, 1,215.84 and 508.18

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Solution

The fourth proportional to 881.25, 1,215.84 and 508.18 is: 701.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.25 : 1,215.84 = 508.18 : x
  2. Step 2: Convert to fraction form
    881.25/1,215.84 = 508.18/x
  3. Step 3: Cross multiply
    881.25x = 1,215.84 × 508.18
  4. Step 4: Simplify right side
    881.25x = 617,862.92
  5. Step 5: Solve for x
    x = 617,862.92/881.25
  6. Step 6: Final answer
    x = 701.12

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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.