Home / 389,976.18-587,626.15-320,456.15

Finding the Fourth Proportional to 389,976.18, 587,626.15 and 320,456.15

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Solution

The fourth proportional to 389,976.18, 587,626.15 and 320,456.15 is: 482,871.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,976.18 : 587,626.15 = 320,456.15 : x
  2. Step 2: Convert to fraction form
    389,976.18/587,626.15 = 320,456.15/x
  3. Step 3: Cross multiply
    389,976.18x = 587,626.15 × 320,456.15
  4. Step 4: Simplify right side
    389,976.18x = 188,308,411,865.53
  5. Step 5: Solve for x
    x = 188,308,411,865.53/389,976.18
  6. Step 6: Final answer
    x = 482,871.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.