Home / 1,400.45-2,100.74-426.56

Finding the Fourth Proportional to 1,400.45, 2,100.74 and 426.56

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Solution

The fourth proportional to 1,400.45, 2,100.74 and 426.56 is: 639.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.45 : 2,100.74 = 426.56 : x
  2. Step 2: Convert to fraction form
    1,400.45/2,100.74 = 426.56/x
  3. Step 3: Cross multiply
    1,400.45x = 2,100.74 × 426.56
  4. Step 4: Simplify right side
    1,400.45x = 896,079.02
  5. Step 5: Solve for x
    x = 896,079.02/1,400.45
  6. Step 6: Final answer
    x = 639.85

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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.