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Finding the Fourth Proportional to 2,176.78, 3,263.42 and 877

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Solution

The fourth proportional to 2,176.78, 3,263.42 and 877 is: 1,314.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.78 : 3,263.42 = 877 : x
  2. Step 2: Convert to fraction form
    2,176.78/3,263.42 = 877/x
  3. Step 3: Cross multiply
    2,176.78x = 3,263.42 × 877
  4. Step 4: Simplify right side
    2,176.78x = 2,862,019.34
  5. Step 5: Solve for x
    x = 2,862,019.34/2,176.78
  6. Step 6: Final answer
    x = 1,314.79

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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.