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Finding the Fourth Proportional to 711,204.48, 981,422.46 and 388,850.40

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Solution

The fourth proportional to 711,204.48, 981,422.46 and 388,850.40 is: 536,591.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,204.48 : 981,422.46 = 388,850.40 : x
  2. Step 2: Convert to fraction form
    711,204.48/981,422.46 = 388,850.40/x
  3. Step 3: Cross multiply
    711,204.48x = 981,422.46 × 388,850.40
  4. Step 4: Simplify right side
    711,204.48x = 381,626,516,139.98
  5. Step 5: Solve for x
    x = 381,626,516,139.98/711,204.48
  6. Step 6: Final answer
    x = 536,591.83

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1.5x scale

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.