Home / 1,440.20-2,161.01-515.83

Finding the Fourth Proportional to 1,440.20, 2,161.01 and 515.83

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Solution

The fourth proportional to 1,440.20, 2,161.01 and 515.83 is: 774.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.20 : 2,161.01 = 515.83 : x
  2. Step 2: Convert to fraction form
    1,440.20/2,161.01 = 515.83/x
  3. Step 3: Cross multiply
    1,440.20x = 2,161.01 × 515.83
  4. Step 4: Simplify right side
    1,440.20x = 1,114,712.50
  5. Step 5: Solve for x
    x = 1,114,712.50/1,440.20
  6. Step 6: Final answer
    x = 774.00

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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.