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Finding the Fourth Proportional to 885.34, 1,221.28 and 736.71

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Solution

The fourth proportional to 885.34, 1,221.28 and 736.71 is: 1,016.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.34 : 1,221.28 = 736.71 : x
  2. Step 2: Convert to fraction form
    885.34/1,221.28 = 736.71/x
  3. Step 3: Cross multiply
    885.34x = 1,221.28 × 736.71
  4. Step 4: Simplify right side
    885.34x = 899,729.19
  5. Step 5: Solve for x
    x = 899,729.19/885.34
  6. Step 6: Final answer
    x = 1,016.25

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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.