Home / 1,665.50-2,495.61-1,115.66

Finding the Fourth Proportional to 1,665.50, 2,495.61 and 1,115.66

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Solution

The fourth proportional to 1,665.50, 2,495.61 and 1,115.66 is: 1,671.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.50 : 2,495.61 = 1,115.66 : x
  2. Step 2: Convert to fraction form
    1,665.50/2,495.61 = 1,115.66/x
  3. Step 3: Cross multiply
    1,665.50x = 2,495.61 × 1,115.66
  4. Step 4: Simplify right side
    1,665.50x = 2,784,252.25
  5. Step 5: Solve for x
    x = 2,784,252.25/1,665.50
  6. Step 6: Final answer
    x = 1,671.72

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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.