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Finding the Fourth Proportional to 2,387.68, 3,295.20 and 1,339.84

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Solution

The fourth proportional to 2,387.68, 3,295.20 and 1,339.84 is: 1,849.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.68 : 3,295.20 = 1,339.84 : x
  2. Step 2: Convert to fraction form
    2,387.68/3,295.20 = 1,339.84/x
  3. Step 3: Cross multiply
    2,387.68x = 3,295.20 × 1,339.84
  4. Step 4: Simplify right side
    2,387.68x = 4,415,040.77
  5. Step 5: Solve for x
    x = 4,415,040.77/2,387.68
  6. Step 6: Final answer
    x = 1,849.09

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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.