Home / 1,385.03-2,077.58-411.21

Finding the Fourth Proportional to 1,385.03, 2,077.58 and 411.21

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Solution

The fourth proportional to 1,385.03, 2,077.58 and 411.21 is: 616.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.03 : 2,077.58 = 411.21 : x
  2. Step 2: Convert to fraction form
    1,385.03/2,077.58 = 411.21/x
  3. Step 3: Cross multiply
    1,385.03x = 2,077.58 × 411.21
  4. Step 4: Simplify right side
    1,385.03x = 854,322.70
  5. Step 5: Solve for x
    x = 854,322.70/1,385.03
  6. Step 6: Final answer
    x = 616.83

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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.