Home / 1,377.20-2,065.85-403.40

Finding the Fourth Proportional to 1,377.20, 2,065.85 and 403.40

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Solution

The fourth proportional to 1,377.20, 2,065.85 and 403.40 is: 605.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.20 : 2,065.85 = 403.40 : x
  2. Step 2: Convert to fraction form
    1,377.20/2,065.85 = 403.40/x
  3. Step 3: Cross multiply
    1,377.20x = 2,065.85 × 403.40
  4. Step 4: Simplify right side
    1,377.20x = 833,361.87
  5. Step 5: Solve for x
    x = 833,361.87/1,377.20
  6. Step 6: Final answer
    x = 605.11

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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.