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Finding the Fourth Proportional to 2,387.70, 3,294.81 and 1,393.06

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Solution

The fourth proportional to 2,387.70, 3,294.81 and 1,393.06 is: 1,922.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.70 : 3,294.81 = 1,393.06 : x
  2. Step 2: Convert to fraction form
    2,387.70/3,294.81 = 1,393.06/x
  3. Step 3: Cross multiply
    2,387.70x = 3,294.81 × 1,393.06
  4. Step 4: Simplify right side
    2,387.70x = 4,589,868.02
  5. Step 5: Solve for x
    x = 4,589,868.02/2,387.70
  6. Step 6: Final answer
    x = 1,922.30

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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.