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Finding the Fourth Proportional to 1,244.84, 1,870.44 and 939.56

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Solution

The fourth proportional to 1,244.84, 1,870.44 and 939.56 is: 1,411.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.84 : 1,870.44 = 939.56 : x
  2. Step 2: Convert to fraction form
    1,244.84/1,870.44 = 939.56/x
  3. Step 3: Cross multiply
    1,244.84x = 1,870.44 × 939.56
  4. Step 4: Simplify right side
    1,244.84x = 1,757,395.28
  5. Step 5: Solve for x
    x = 1,757,395.28/1,244.84
  6. Step 6: Final answer
    x = 1,411.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.