Home / 1,280.14-1,919.36-499.67

Finding the Fourth Proportional to 1,280.14, 1,919.36 and 499.67

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Solution

The fourth proportional to 1,280.14, 1,919.36 and 499.67 is: 749.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.14 : 1,919.36 = 499.67 : x
  2. Step 2: Convert to fraction form
    1,280.14/1,919.36 = 499.67/x
  3. Step 3: Cross multiply
    1,280.14x = 1,919.36 × 499.67
  4. Step 4: Simplify right side
    1,280.14x = 959,045.46
  5. Step 5: Solve for x
    x = 959,045.46/1,280.14
  6. Step 6: Final answer
    x = 749.17

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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.