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Finding the Fourth Proportional to 936.96, 1,293.08 and 517.40

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Solution

The fourth proportional to 936.96, 1,293.08 and 517.40 is: 714.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.96 : 1,293.08 = 517.40 : x
  2. Step 2: Convert to fraction form
    936.96/1,293.08 = 517.40/x
  3. Step 3: Cross multiply
    936.96x = 1,293.08 × 517.40
  4. Step 4: Simplify right side
    936.96x = 669,040.24
  5. Step 5: Solve for x
    x = 669,040.24/936.96
  6. Step 6: Final answer
    x = 714.05

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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.