Home / 711,568.80-981,928.32-389,216.16

Finding the Fourth Proportional to 711,568.80, 981,928.32 and 389,216.16

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Solution

The fourth proportional to 711,568.80, 981,928.32 and 389,216.16 is: 537,098.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,568.80 : 981,928.32 = 389,216.16 : x
  2. Step 2: Convert to fraction form
    711,568.80/981,928.32 = 389,216.16/x
  3. Step 3: Cross multiply
    711,568.80x = 981,928.32 × 389,216.16
  4. Step 4: Simplify right side
    711,568.80x = 382,182,370,105.65
  5. Step 5: Solve for x
    x = 382,182,370,105.65/711,568.80
  6. Step 6: Final answer
    x = 537,098.27

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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.