Home / 1,511.78-2,267.30-415.92

Finding the Fourth Proportional to 1,511.78, 2,267.30 and 415.92

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Solution

The fourth proportional to 1,511.78, 2,267.30 and 415.92 is: 623.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.78 : 2,267.30 = 415.92 : x
  2. Step 2: Convert to fraction form
    1,511.78/2,267.30 = 415.92/x
  3. Step 3: Cross multiply
    1,511.78x = 2,267.30 × 415.92
  4. Step 4: Simplify right side
    1,511.78x = 943,024.18
  5. Step 5: Solve for x
    x = 943,024.18/1,511.78
  6. Step 6: Final answer
    x = 623.78

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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.