Home / 1,439.18-2,158.21-514.56

Finding the Fourth Proportional to 1,439.18, 2,158.21 and 514.56

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Solution

The fourth proportional to 1,439.18, 2,158.21 and 514.56 is: 771.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.18 : 2,158.21 = 514.56 : x
  2. Step 2: Convert to fraction form
    1,439.18/2,158.21 = 514.56/x
  3. Step 3: Cross multiply
    1,439.18x = 2,158.21 × 514.56
  4. Step 4: Simplify right side
    1,439.18x = 1,110,525.96
  5. Step 5: Solve for x
    x = 1,110,525.96/1,439.18
  6. Step 6: Final answer
    x = 771.64

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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.