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Finding the Fourth Proportional to 844.59, 1,265.85 and 690.83

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Solution

The fourth proportional to 844.59, 1,265.85 and 690.83 is: 1,035.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.59 : 1,265.85 = 690.83 : x
  2. Step 2: Convert to fraction form
    844.59/1,265.85 = 690.83/x
  3. Step 3: Cross multiply
    844.59x = 1,265.85 × 690.83
  4. Step 4: Simplify right side
    844.59x = 874,487.16
  5. Step 5: Solve for x
    x = 874,487.16/844.59
  6. Step 6: Final answer
    x = 1,035.40

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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.