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Finding the Fourth Proportional to 1,874.61, 2,811.51 and 576.45

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Solution

The fourth proportional to 1,874.61, 2,811.51 and 576.45 is: 864.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,874.61 : 2,811.51 = 576.45 : x
  2. Step 2: Convert to fraction form
    1,874.61/2,811.51 = 576.45/x
  3. Step 3: Cross multiply
    1,874.61x = 2,811.51 × 576.45
  4. Step 4: Simplify right side
    1,874.61x = 1,620,694.94
  5. Step 5: Solve for x
    x = 1,620,694.94/1,874.61
  6. Step 6: Final answer
    x = 864.55

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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.