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Finding the Fourth Proportional to 846.68, 1,259.89 and 843.80

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Solution

The fourth proportional to 846.68, 1,259.89 and 843.80 is: 1,255.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.68 : 1,259.89 = 843.80 : x
  2. Step 2: Convert to fraction form
    846.68/1,259.89 = 843.80/x
  3. Step 3: Cross multiply
    846.68x = 1,259.89 × 843.80
  4. Step 4: Simplify right side
    846.68x = 1,063,095.18
  5. Step 5: Solve for x
    x = 1,063,095.18/846.68
  6. Step 6: Final answer
    x = 1,255.60

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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.