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Finding the Fourth Proportional to 885.24, 1,221.54 and 535.86

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Solution

The fourth proportional to 885.24, 1,221.54 and 535.86 is: 739.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.24 : 1,221.54 = 535.86 : x
  2. Step 2: Convert to fraction form
    885.24/1,221.54 = 535.86/x
  3. Step 3: Cross multiply
    885.24x = 1,221.54 × 535.86
  4. Step 4: Simplify right side
    885.24x = 654,574.42
  5. Step 5: Solve for x
    x = 654,574.42/885.24
  6. Step 6: Final answer
    x = 739.43

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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.