Home / 711,456.62-981,789.25-389,159.78

Finding the Fourth Proportional to 711,456.62, 981,789.25 and 389,159.78

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Solution

The fourth proportional to 711,456.62, 981,789.25 and 389,159.78 is: 537,029.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,456.62 : 981,789.25 = 389,159.78 : x
  2. Step 2: Convert to fraction form
    711,456.62/981,789.25 = 389,159.78/x
  3. Step 3: Cross multiply
    711,456.62x = 981,789.25 × 389,159.78
  4. Step 4: Simplify right side
    711,456.62x = 382,072,888,536.37
  5. Step 5: Solve for x
    x = 382,072,888,536.37/711,456.62
  6. Step 6: Final answer
    x = 537,029.07

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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.