Home / 1,511.62-2,084.25-1,289.86

Finding the Fourth Proportional to 1,511.62, 2,084.25 and 1,289.86

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Solution

The fourth proportional to 1,511.62, 2,084.25 and 1,289.86 is: 1,778.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.62 : 2,084.25 = 1,289.86 : x
  2. Step 2: Convert to fraction form
    1,511.62/2,084.25 = 1,289.86/x
  3. Step 3: Cross multiply
    1,511.62x = 2,084.25 × 1,289.86
  4. Step 4: Simplify right side
    1,511.62x = 2,688,390.71
  5. Step 5: Solve for x
    x = 2,688,390.71/1,511.62
  6. Step 6: Final answer
    x = 1,778.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.