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Finding the Fourth Proportional to 2,493, 3,440.58 and 1,389

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Solution

The fourth proportional to 2,493, 3,440.58 and 1,389 is: 1,916.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,493 : 3,440.58 = 1,389 : x
  2. Step 2: Convert to fraction form
    2,493/3,440.58 = 1,389/x
  3. Step 3: Cross multiply
    2,493x = 3,440.58 × 1,389
  4. Step 4: Simplify right side
    2,493x = 4,778,965.62
  5. Step 5: Solve for x
    x = 4,778,965.62/2,493
  6. Step 6: Final answer
    x = 1,916.95

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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.