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Finding the Fourth Proportional to 1,884.64, 2,824.12 and 788.72

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Solution

The fourth proportional to 1,884.64, 2,824.12 and 788.72 is: 1,181.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,884.64 : 2,824.12 = 788.72 : x
  2. Step 2: Convert to fraction form
    1,884.64/2,824.12 = 788.72/x
  3. Step 3: Cross multiply
    1,884.64x = 2,824.12 × 788.72
  4. Step 4: Simplify right side
    1,884.64x = 2,227,439.93
  5. Step 5: Solve for x
    x = 2,227,439.93/1,884.64
  6. Step 6: Final answer
    x = 1,181.89

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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.