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Finding the Fourth Proportional to 2,527.84, 3,790.64 and 987.76

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Solution

The fourth proportional to 2,527.84, 3,790.64 and 987.76 is: 1,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,527.84 : 3,790.64 = 987.76 : x
  2. Step 2: Convert to fraction form
    2,527.84/3,790.64 = 987.76/x
  3. Step 3: Cross multiply
    2,527.84x = 3,790.64 × 987.76
  4. Step 4: Simplify right side
    2,527.84x = 3,744,242.57
  5. Step 5: Solve for x
    x = 3,744,242.57/2,527.84
  6. Step 6: Final answer
    x = 1,481.20

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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.