Home / 881.03-1,215.80-527.21

Finding the Fourth Proportional to 881.03, 1,215.80 and 527.21

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Solution

The fourth proportional to 881.03, 1,215.80 and 527.21 is: 727.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.03 : 1,215.80 = 527.21 : x
  2. Step 2: Convert to fraction form
    881.03/1,215.80 = 527.21/x
  3. Step 3: Cross multiply
    881.03x = 1,215.80 × 527.21
  4. Step 4: Simplify right side
    881.03x = 640,975.84
  5. Step 5: Solve for x
    x = 640,975.84/881.03
  6. Step 6: Final answer
    x = 727.53

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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.