Home / 1,511.16-2,265.68-780.34

Finding the Fourth Proportional to 1,511.16, 2,265.68 and 780.34

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Solution

The fourth proportional to 1,511.16, 2,265.68 and 780.34 is: 1,169.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.16 : 2,265.68 = 780.34 : x
  2. Step 2: Convert to fraction form
    1,511.16/2,265.68 = 780.34/x
  3. Step 3: Cross multiply
    1,511.16x = 2,265.68 × 780.34
  4. Step 4: Simplify right side
    1,511.16x = 1,768,000.73
  5. Step 5: Solve for x
    x = 1,768,000.73/1,511.16
  6. Step 6: Final answer
    x = 1,169.96

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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.