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Finding the Fourth Proportional to 1,815.08, 2,721.98 and 788.52

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Solution

The fourth proportional to 1,815.08, 2,721.98 and 788.52 is: 1,182.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.08 : 2,721.98 = 788.52 : x
  2. Step 2: Convert to fraction form
    1,815.08/2,721.98 = 788.52/x
  3. Step 3: Cross multiply
    1,815.08x = 2,721.98 × 788.52
  4. Step 4: Simplify right side
    1,815.08x = 2,146,335.67
  5. Step 5: Solve for x
    x = 2,146,335.67/1,815.08
  6. Step 6: Final answer
    x = 1,182.50

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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.