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Finding the Fourth Proportional to 1,876.68, 2,811.60 and 1,053.72

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Solution

The fourth proportional to 1,876.68, 2,811.60 and 1,053.72 is: 1,578.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,876.68 : 2,811.60 = 1,053.72 : x
  2. Step 2: Convert to fraction form
    1,876.68/2,811.60 = 1,053.72/x
  3. Step 3: Cross multiply
    1,876.68x = 2,811.60 × 1,053.72
  4. Step 4: Simplify right side
    1,876.68x = 2,962,639.15
  5. Step 5: Solve for x
    x = 2,962,639.15/1,876.68
  6. Step 6: Final answer
    x = 1,578.66

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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.