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Finding the Fourth Proportional to 891,191.12, 1,229,843.64 and 488,783.12

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Solution

The fourth proportional to 891,191.12, 1,229,843.64 and 488,783.12 is: 674,520.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,191.12 : 1,229,843.64 = 488,783.12 : x
  2. Step 2: Convert to fraction form
    891,191.12/1,229,843.64 = 488,783.12/x
  3. Step 3: Cross multiply
    891,191.12x = 1,229,843.64 × 488,783.12
  4. Step 4: Simplify right side
    891,191.12x = 601,126,811,471.36
  5. Step 5: Solve for x
    x = 601,126,811,471.36/891,191.12
  6. Step 6: Final answer
    x = 674,520.65

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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.