Home / 1,400.10-2,100.16-426.20

Finding the Fourth Proportional to 1,400.10, 2,100.16 and 426.20

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Solution

The fourth proportional to 1,400.10, 2,100.16 and 426.20 is: 639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.10 : 2,100.16 = 426.20 : x
  2. Step 2: Convert to fraction form
    1,400.10/2,100.16 = 426.20/x
  3. Step 3: Cross multiply
    1,400.10x = 2,100.16 × 426.20
  4. Step 4: Simplify right side
    1,400.10x = 895,088.19
  5. Step 5: Solve for x
    x = 895,088.19/1,400.10
  6. Step 6: Final answer
    x = 639.30

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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.