Home / 1,440.85-2,161.43-400.86

Finding the Fourth Proportional to 1,440.85, 2,161.43 and 400.86

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Solution

The fourth proportional to 1,440.85, 2,161.43 and 400.86 is: 601.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.85 : 2,161.43 = 400.86 : x
  2. Step 2: Convert to fraction form
    1,440.85/2,161.43 = 400.86/x
  3. Step 3: Cross multiply
    1,440.85x = 2,161.43 × 400.86
  4. Step 4: Simplify right side
    1,440.85x = 866,418.02
  5. Step 5: Solve for x
    x = 866,418.02/1,440.85
  6. Step 6: Final answer
    x = 601.32

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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.