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Finding the Fourth Proportional to 2,387.68, 3,294.88 and 1,393.00

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Solution

The fourth proportional to 2,387.68, 3,294.88 and 1,393.00 is: 1,922.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.68 : 3,294.88 = 1,393.00 : x
  2. Step 2: Convert to fraction form
    2,387.68/3,294.88 = 1,393.00/x
  3. Step 3: Cross multiply
    2,387.68x = 3,294.88 × 1,393.00
  4. Step 4: Simplify right side
    2,387.68x = 4,589,756.12
  5. Step 5: Solve for x
    x = 4,589,756.12/2,387.68
  6. Step 6: Final answer
    x = 1,922.27

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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.