Home / 1,398.15-2,097.21-424.22

Finding the Fourth Proportional to 1,398.15, 2,097.21 and 424.22

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Solution

The fourth proportional to 1,398.15, 2,097.21 and 424.22 is: 636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.15 : 2,097.21 = 424.22 : x
  2. Step 2: Convert to fraction form
    1,398.15/2,097.21 = 424.22/x
  3. Step 3: Cross multiply
    1,398.15x = 2,097.21 × 424.22
  4. Step 4: Simplify right side
    1,398.15x = 889,667.94
  5. Step 5: Solve for x
    x = 889,667.94/1,398.15
  6. Step 6: Final answer
    x = 636.32

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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.