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Finding the Fourth Proportional to 889.86, 1,327.02 and 868.89

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Solution

The fourth proportional to 889.86, 1,327.02 and 868.89 is: 1,295.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.86 : 1,327.02 = 868.89 : x
  2. Step 2: Convert to fraction form
    889.86/1,327.02 = 868.89/x
  3. Step 3: Cross multiply
    889.86x = 1,327.02 × 868.89
  4. Step 4: Simplify right side
    889.86x = 1,153,034.41
  5. Step 5: Solve for x
    x = 1,153,034.41/889.86
  6. Step 6: Final answer
    x = 1,295.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.