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Finding the Fourth Proportional to 885.77, 1,330.71 and 850.92

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Solution

The fourth proportional to 885.77, 1,330.71 and 850.92 is: 1,278.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.77 : 1,330.71 = 850.92 : x
  2. Step 2: Convert to fraction form
    885.77/1,330.71 = 850.92/x
  3. Step 3: Cross multiply
    885.77x = 1,330.71 × 850.92
  4. Step 4: Simplify right side
    885.77x = 1,132,327.75
  5. Step 5: Solve for x
    x = 1,132,327.75/885.77
  6. Step 6: Final answer
    x = 1,278.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.