Home / 711,407.46-981,749.91-389,110.65

Finding the Fourth Proportional to 711,407.46, 981,749.91 and 389,110.65

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Solution

The fourth proportional to 711,407.46, 981,749.91 and 389,110.65 is: 536,976.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,407.46 : 981,749.91 = 389,110.65 : x
  2. Step 2: Convert to fraction form
    711,407.46/981,749.91 = 389,110.65/x
  3. Step 3: Cross multiply
    711,407.46x = 981,749.91 × 389,110.65
  4. Step 4: Simplify right side
    711,407.46x = 382,009,345,617.54
  5. Step 5: Solve for x
    x = 382,009,345,617.54/711,407.46
  6. Step 6: Final answer
    x = 536,976.86

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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.