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Finding the Fourth Proportional to 885.01, 1,221.33 and 535.70

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Solution

The fourth proportional to 885.01, 1,221.33 and 535.70 is: 739.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.01 : 1,221.33 = 535.70 : x
  2. Step 2: Convert to fraction form
    885.01/1,221.33 = 535.70/x
  3. Step 3: Cross multiply
    885.01x = 1,221.33 × 535.70
  4. Step 4: Simplify right side
    885.01x = 654,257.70
  5. Step 5: Solve for x
    x = 654,257.70/885.01
  6. Step 6: Final answer
    x = 739.27

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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.