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Finding the Fourth Proportional to 2,393.84, 3,291.72 and 2,320.88

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Solution

The fourth proportional to 2,393.84, 3,291.72 and 2,320.88 is: 3,191.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,393.84 : 3,291.72 = 2,320.88 : x
  2. Step 2: Convert to fraction form
    2,393.84/3,291.72 = 2,320.88/x
  3. Step 3: Cross multiply
    2,393.84x = 3,291.72 × 2,320.88
  4. Step 4: Simplify right side
    2,393.84x = 7,639,687.11
  5. Step 5: Solve for x
    x = 7,639,687.11/2,393.84
  6. Step 6: Final answer
    x = 3,191.39

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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.