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Finding the Fourth Proportional to 846.80, 1,168.71 and 515.33

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Solution

The fourth proportional to 846.80, 1,168.71 and 515.33 is: 711.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.80 : 1,168.71 = 515.33 : x
  2. Step 2: Convert to fraction form
    846.80/1,168.71 = 515.33/x
  3. Step 3: Cross multiply
    846.80x = 1,168.71 × 515.33
  4. Step 4: Simplify right side
    846.80x = 602,270.83
  5. Step 5: Solve for x
    x = 602,270.83/846.80
  6. Step 6: Final answer
    x = 711.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.