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Finding the Fourth Proportional to 560,422.80, 840,634.20 and 389,180.70

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Solution

The fourth proportional to 560,422.80, 840,634.20 and 389,180.70 is: 583,771.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,422.80 : 840,634.20 = 389,180.70 : x
  2. Step 2: Convert to fraction form
    560,422.80/840,634.20 = 389,180.70/x
  3. Step 3: Cross multiply
    560,422.80x = 840,634.20 × 389,180.70
  4. Step 4: Simplify right side
    560,422.80x = 327,158,606,399.94
  5. Step 5: Solve for x
    x = 327,158,606,399.94/560,422.80
  6. Step 6: Final answer
    x = 583,771.05

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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.