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Finding the Fourth Proportional to 1,575.76, 2,174.28 and 877

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Solution

The fourth proportional to 1,575.76, 2,174.28 and 877 is: 1,210.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.76 : 2,174.28 = 877 : x
  2. Step 2: Convert to fraction form
    1,575.76/2,174.28 = 877/x
  3. Step 3: Cross multiply
    1,575.76x = 2,174.28 × 877
  4. Step 4: Simplify right side
    1,575.76x = 1,906,843.56
  5. Step 5: Solve for x
    x = 1,906,843.56/1,575.76
  6. Step 6: Final answer
    x = 1,210.11

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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.