Home / 426,721.28-640,396.86-202,081.28

Finding the Fourth Proportional to 426,721.28, 640,396.86 and 202,081.28

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Solution

The fourth proportional to 426,721.28, 640,396.86 and 202,081.28 is: 303,271.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,721.28 : 640,396.86 = 202,081.28 : x
  2. Step 2: Convert to fraction form
    426,721.28/640,396.86 = 202,081.28/x
  3. Step 3: Cross multiply
    426,721.28x = 640,396.86 × 202,081.28
  4. Step 4: Simplify right side
    426,721.28x = 129,412,213,974.80
  5. Step 5: Solve for x
    x = 129,412,213,974.80/426,721.28
  6. Step 6: Final answer
    x = 303,271.06

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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.