Home / 1,400.05-2,100.12-426.16

Finding the Fourth Proportional to 1,400.05, 2,100.12 and 426.16

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Solution

The fourth proportional to 1,400.05, 2,100.12 and 426.16 is: 639.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.05 : 2,100.12 = 426.16 : x
  2. Step 2: Convert to fraction form
    1,400.05/2,100.12 = 426.16/x
  3. Step 3: Cross multiply
    1,400.05x = 2,100.12 × 426.16
  4. Step 4: Simplify right side
    1,400.05x = 894,987.14
  5. Step 5: Solve for x
    x = 894,987.14/1,400.05
  6. Step 6: Final answer
    x = 639.25

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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.