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Finding the Fourth Proportional to 2,787, 4,180.64 and 1,055.76

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Solution

The fourth proportional to 2,787, 4,180.64 and 1,055.76 is: 1,583.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787 : 4,180.64 = 1,055.76 : x
  2. Step 2: Convert to fraction form
    2,787/4,180.64 = 1,055.76/x
  3. Step 3: Cross multiply
    2,787x = 4,180.64 × 1,055.76
  4. Step 4: Simplify right side
    2,787x = 4,413,747.21
  5. Step 5: Solve for x
    x = 4,413,747.21/2,787
  6. Step 6: Final answer
    x = 1,583.69

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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.