Home / 1,280.69-1,919.23-587.13

Finding the Fourth Proportional to 1,280.69, 1,919.23 and 587.13

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Solution

The fourth proportional to 1,280.69, 1,919.23 and 587.13 is: 879.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.69 : 1,919.23 = 587.13 : x
  2. Step 2: Convert to fraction form
    1,280.69/1,919.23 = 587.13/x
  3. Step 3: Cross multiply
    1,280.69x = 1,919.23 × 587.13
  4. Step 4: Simplify right side
    1,280.69x = 1,126,828.84
  5. Step 5: Solve for x
    x = 1,126,828.84/1,280.69
  6. Step 6: Final answer
    x = 879.86

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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.