Home / 1,280.30-1,920.96-500.38

Finding the Fourth Proportional to 1,280.30, 1,920.96 and 500.38

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Solution

The fourth proportional to 1,280.30, 1,920.96 and 500.38 is: 750.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.30 : 1,920.96 = 500.38 : x
  2. Step 2: Convert to fraction form
    1,280.30/1,920.96 = 500.38/x
  3. Step 3: Cross multiply
    1,280.30x = 1,920.96 × 500.38
  4. Step 4: Simplify right side
    1,280.30x = 961,209.96
  5. Step 5: Solve for x
    x = 961,209.96/1,280.30
  6. Step 6: Final answer
    x = 750.77

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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.