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Finding the Fourth Proportional to 1,569.75, 2,165.43 and 939.97

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Solution

The fourth proportional to 1,569.75, 2,165.43 and 939.97 is: 1,296.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.75 : 2,165.43 = 939.97 : x
  2. Step 2: Convert to fraction form
    1,569.75/2,165.43 = 939.97/x
  3. Step 3: Cross multiply
    1,569.75x = 2,165.43 × 939.97
  4. Step 4: Simplify right side
    1,569.75x = 2,035,445.47
  5. Step 5: Solve for x
    x = 2,035,445.47/1,569.75
  6. Step 6: Final answer
    x = 1,296.67

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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.