Home / 1,394.01-2,091.18-420.11

Finding the Fourth Proportional to 1,394.01, 2,091.18 and 420.11

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Solution

The fourth proportional to 1,394.01, 2,091.18 and 420.11 is: 630.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.01 : 2,091.18 = 420.11 : x
  2. Step 2: Convert to fraction form
    1,394.01/2,091.18 = 420.11/x
  3. Step 3: Cross multiply
    1,394.01x = 2,091.18 × 420.11
  4. Step 4: Simplify right side
    1,394.01x = 878,515.17
  5. Step 5: Solve for x
    x = 878,515.17/1,394.01
  6. Step 6: Final answer
    x = 630.21

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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.