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Finding the Fourth Proportional to 2,376.95, 3,563.88 and 991.23

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Solution

The fourth proportional to 2,376.95, 3,563.88 and 991.23 is: 1,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,376.95 : 3,563.88 = 991.23 : x
  2. Step 2: Convert to fraction form
    2,376.95/3,563.88 = 991.23/x
  3. Step 3: Cross multiply
    2,376.95x = 3,563.88 × 991.23
  4. Step 4: Simplify right side
    2,376.95x = 3,532,624.77
  5. Step 5: Solve for x
    x = 3,532,624.77/2,376.95
  6. Step 6: Final answer
    x = 1,486.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.