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Finding the Fourth Proportional to 881.29, 1,216.20 and 508.21

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Solution

The fourth proportional to 881.29, 1,216.20 and 508.21 is: 701.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.29 : 1,216.20 = 508.21 : x
  2. Step 2: Convert to fraction form
    881.29/1,216.20 = 508.21/x
  3. Step 3: Cross multiply
    881.29x = 1,216.20 × 508.21
  4. Step 4: Simplify right side
    881.29x = 618,085.00
  5. Step 5: Solve for x
    x = 618,085.00/881.29
  6. Step 6: Final answer
    x = 701.34

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1.5x scale

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.