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Finding the Fourth Proportional to 846.69, 1,168.34 and 515.21

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Solution

The fourth proportional to 846.69, 1,168.34 and 515.21 is: 710.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.69 : 1,168.34 = 515.21 : x
  2. Step 2: Convert to fraction form
    846.69/1,168.34 = 515.21/x
  3. Step 3: Cross multiply
    846.69x = 1,168.34 × 515.21
  4. Step 4: Simplify right side
    846.69x = 601,932.03
  5. Step 5: Solve for x
    x = 601,932.03/846.69
  6. Step 6: Final answer
    x = 710.92

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Double scale
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1.5x scale

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.