Home / 711,005.49-981,211.05-388,724.31

Finding the Fourth Proportional to 711,005.49, 981,211.05 and 388,724.31

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Solution

The fourth proportional to 711,005.49, 981,211.05 and 388,724.31 is: 536,452.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,005.49 : 981,211.05 = 388,724.31 : x
  2. Step 2: Convert to fraction form
    711,005.49/981,211.05 = 388,724.31/x
  3. Step 3: Cross multiply
    711,005.49x = 981,211.05 × 388,724.31
  4. Step 4: Simplify right side
    711,005.49x = 381,420,588,375.63
  5. Step 5: Solve for x
    x = 381,420,588,375.63/711,005.49
  6. Step 6: Final answer
    x = 536,452.38

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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.