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Finding the Fourth Proportional to 1,866.60, 2,799.78 and 633.90

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Solution

The fourth proportional to 1,866.60, 2,799.78 and 633.90 is: 950.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.60 : 2,799.78 = 633.90 : x
  2. Step 2: Convert to fraction form
    1,866.60/2,799.78 = 633.90/x
  3. Step 3: Cross multiply
    1,866.60x = 2,799.78 × 633.90
  4. Step 4: Simplify right side
    1,866.60x = 1,774,780.54
  5. Step 5: Solve for x
    x = 1,774,780.54/1,866.60
  6. Step 6: Final answer
    x = 950.81

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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.