Home / 1,385.04-2,077.91-411.11

Finding the Fourth Proportional to 1,385.04, 2,077.91 and 411.11

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Solution

The fourth proportional to 1,385.04, 2,077.91 and 411.11 is: 616.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.04 : 2,077.91 = 411.11 : x
  2. Step 2: Convert to fraction form
    1,385.04/2,077.91 = 411.11/x
  3. Step 3: Cross multiply
    1,385.04x = 2,077.91 × 411.11
  4. Step 4: Simplify right side
    1,385.04x = 854,249.58
  5. Step 5: Solve for x
    x = 854,249.58/1,385.04
  6. Step 6: Final answer
    x = 616.77

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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.