Home / 1,280.89-1,919.85-499.96

Finding the Fourth Proportional to 1,280.89, 1,919.85 and 499.96

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Solution

The fourth proportional to 1,280.89, 1,919.85 and 499.96 is: 749.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.89 : 1,919.85 = 499.96 : x
  2. Step 2: Convert to fraction form
    1,280.89/1,919.85 = 499.96/x
  3. Step 3: Cross multiply
    1,280.89x = 1,919.85 × 499.96
  4. Step 4: Simplify right side
    1,280.89x = 959,848.21
  5. Step 5: Solve for x
    x = 959,848.21/1,280.89
  6. Step 6: Final answer
    x = 749.36

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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.