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Finding the Fourth Proportional to 2,593.12, 3,888.78 and 1,438

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Solution

The fourth proportional to 2,593.12, 3,888.78 and 1,438 is: 2,156.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,593.12 : 3,888.78 = 1,438 : x
  2. Step 2: Convert to fraction form
    2,593.12/3,888.78 = 1,438/x
  3. Step 3: Cross multiply
    2,593.12x = 3,888.78 × 1,438
  4. Step 4: Simplify right side
    2,593.12x = 5,592,065.64
  5. Step 5: Solve for x
    x = 5,592,065.64/2,593.12
  6. Step 6: Final answer
    x = 2,156.50

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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.