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Finding the Fourth Proportional to 2,387.79, 3,295.16 and 1,339.85

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Solution

The fourth proportional to 2,387.79, 3,295.16 and 1,339.85 is: 1,849.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.79 : 3,295.16 = 1,339.85 : x
  2. Step 2: Convert to fraction form
    2,387.79/3,295.16 = 1,339.85/x
  3. Step 3: Cross multiply
    2,387.79x = 3,295.16 × 1,339.85
  4. Step 4: Simplify right side
    2,387.79x = 4,415,020.13
  5. Step 5: Solve for x
    x = 4,415,020.13/2,387.79
  6. Step 6: Final answer
    x = 1,849.00

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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.