Home / 1,401.55-2,101.95-427.39

Finding the Fourth Proportional to 1,401.55, 2,101.95 and 427.39

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Solution

The fourth proportional to 1,401.55, 2,101.95 and 427.39 is: 640.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.55 : 2,101.95 = 427.39 : x
  2. Step 2: Convert to fraction form
    1,401.55/2,101.95 = 427.39/x
  3. Step 3: Cross multiply
    1,401.55x = 2,101.95 × 427.39
  4. Step 4: Simplify right side
    1,401.55x = 898,352.41
  5. Step 5: Solve for x
    x = 898,352.41/1,401.55
  6. Step 6: Final answer
    x = 640.97

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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.