Home / 486,389.28-671,228.55-305,108.85

Finding the Fourth Proportional to 486,389.28, 671,228.55 and 305,108.85

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Solution

The fourth proportional to 486,389.28, 671,228.55 and 305,108.85 is: 421,057.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,389.28 : 671,228.55 = 305,108.85 : x
  2. Step 2: Convert to fraction form
    486,389.28/671,228.55 = 305,108.85/x
  3. Step 3: Cross multiply
    486,389.28x = 671,228.55 × 305,108.85
  4. Step 4: Simplify right side
    486,389.28x = 204,797,770,977.67
  5. Step 5: Solve for x
    x = 204,797,770,977.67/486,389.28
  6. Step 6: Final answer
    x = 421,057.33

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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.