Home / 427,685.12-640,249.50-258,694.04

Finding the Fourth Proportional to 427,685.12, 640,249.50 and 258,694.04

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Solution

The fourth proportional to 427,685.12, 640,249.50 and 258,694.04 is: 387,267.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,685.12 : 640,249.50 = 258,694.04 : x
  2. Step 2: Convert to fraction form
    427,685.12/640,249.50 = 258,694.04/x
  3. Step 3: Cross multiply
    427,685.12x = 640,249.50 × 258,694.04
  4. Step 4: Simplify right side
    427,685.12x = 165,628,729,762.98
  5. Step 5: Solve for x
    x = 165,628,729,762.98/427,685.12
  6. Step 6: Final answer
    x = 387,267.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.