Home / 1,385.18-2,077.77-411.26

Finding the Fourth Proportional to 1,385.18, 2,077.77 and 411.26

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Solution

The fourth proportional to 1,385.18, 2,077.77 and 411.26 is: 616.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.18 : 2,077.77 = 411.26 : x
  2. Step 2: Convert to fraction form
    1,385.18/2,077.77 = 411.26/x
  3. Step 3: Cross multiply
    1,385.18x = 2,077.77 × 411.26
  4. Step 4: Simplify right side
    1,385.18x = 854,503.69
  5. Step 5: Solve for x
    x = 854,503.69/1,385.18
  6. Step 6: Final answer
    x = 616.89

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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.