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Finding the Fourth Proportional to 885.18, 1,221.75 and 574.14

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Solution

The fourth proportional to 885.18, 1,221.75 and 574.14 is: 792.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.18 : 1,221.75 = 574.14 : x
  2. Step 2: Convert to fraction form
    885.18/1,221.75 = 574.14/x
  3. Step 3: Cross multiply
    885.18x = 1,221.75 × 574.14
  4. Step 4: Simplify right side
    885.18x = 701,455.55
  5. Step 5: Solve for x
    x = 701,455.55/885.18
  6. Step 6: Final answer
    x = 792.44

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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.