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Finding the Fourth Proportional to 1,788.78, 2,465.19 and 1,551.99

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Solution

The fourth proportional to 1,788.78, 2,465.19 and 1,551.99 is: 2,138.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.78 : 2,465.19 = 1,551.99 : x
  2. Step 2: Convert to fraction form
    1,788.78/2,465.19 = 1,551.99/x
  3. Step 3: Cross multiply
    1,788.78x = 2,465.19 × 1,551.99
  4. Step 4: Simplify right side
    1,788.78x = 3,825,950.23
  5. Step 5: Solve for x
    x = 3,825,950.23/1,788.78
  6. Step 6: Final answer
    x = 2,138.86

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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.