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Finding the Fourth Proportional to 936.38, 1,292.43 and 543.63

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Solution

The fourth proportional to 936.38, 1,292.43 and 543.63 is: 750.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.38 : 1,292.43 = 543.63 : x
  2. Step 2: Convert to fraction form
    936.38/1,292.43 = 543.63/x
  3. Step 3: Cross multiply
    936.38x = 1,292.43 × 543.63
  4. Step 4: Simplify right side
    936.38x = 702,603.72
  5. Step 5: Solve for x
    x = 702,603.72/936.38
  6. Step 6: Final answer
    x = 750.34

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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.