Home / 1,280.61-1,919.40-586.69

Finding the Fourth Proportional to 1,280.61, 1,919.40 and 586.69

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Solution

The fourth proportional to 1,280.61, 1,919.40 and 586.69 is: 879.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.61 : 1,919.40 = 586.69 : x
  2. Step 2: Convert to fraction form
    1,280.61/1,919.40 = 586.69/x
  3. Step 3: Cross multiply
    1,280.61x = 1,919.40 × 586.69
  4. Step 4: Simplify right side
    1,280.61x = 1,126,096.58
  5. Step 5: Solve for x
    x = 1,126,096.58/1,280.61
  6. Step 6: Final answer
    x = 879.34

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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.