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Finding the Fourth Proportional to 893.66, 1,340.76 and 738.89

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Solution

The fourth proportional to 893.66, 1,340.76 and 738.89 is: 1,108.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.66 : 1,340.76 = 738.89 : x
  2. Step 2: Convert to fraction form
    893.66/1,340.76 = 738.89/x
  3. Step 3: Cross multiply
    893.66x = 1,340.76 × 738.89
  4. Step 4: Simplify right side
    893.66x = 990,667.45
  5. Step 5: Solve for x
    x = 990,667.45/893.66
  6. Step 6: Final answer
    x = 1,108.55

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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.