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Finding the Fourth Proportional to 2,387.63, 3,581.74 and 1,000.78

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Solution

The fourth proportional to 2,387.63, 3,581.74 and 1,000.78 is: 1,501.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.63 : 3,581.74 = 1,000.78 : x
  2. Step 2: Convert to fraction form
    2,387.63/3,581.74 = 1,000.78/x
  3. Step 3: Cross multiply
    2,387.63x = 3,581.74 × 1,000.78
  4. Step 4: Simplify right side
    2,387.63x = 3,584,538.94
  5. Step 5: Solve for x
    x = 3,584,538.94/2,387.63
  6. Step 6: Final answer
    x = 1,501.30

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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.