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Finding the Fourth Proportional to 886.95, 1,224.21 and 528.42

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Solution

The fourth proportional to 886.95, 1,224.21 and 528.42 is: 729.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.95 : 1,224.21 = 528.42 : x
  2. Step 2: Convert to fraction form
    886.95/1,224.21 = 528.42/x
  3. Step 3: Cross multiply
    886.95x = 1,224.21 × 528.42
  4. Step 4: Simplify right side
    886.95x = 646,903.62
  5. Step 5: Solve for x
    x = 646,903.62/886.95
  6. Step 6: Final answer
    x = 729.36

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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.