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Finding the Fourth Proportional to 885.33, 1,221.48 and 590.90

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Solution

The fourth proportional to 885.33, 1,221.48 and 590.90 is: 815.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.33 : 1,221.48 = 590.90 : x
  2. Step 2: Convert to fraction form
    885.33/1,221.48 = 590.90/x
  3. Step 3: Cross multiply
    885.33x = 1,221.48 × 590.90
  4. Step 4: Simplify right side
    885.33x = 721,766.42
  5. Step 5: Solve for x
    x = 721,766.42/885.33
  6. Step 6: Final answer
    x = 815.25

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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.