Home / 1,929.86-2,663.65-1,091.05

Finding the Fourth Proportional to 1,929.86, 2,663.65 and 1,091.05

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Solution

The fourth proportional to 1,929.86, 2,663.65 and 1,091.05 is: 1,505.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.86 : 2,663.65 = 1,091.05 : x
  2. Step 2: Convert to fraction form
    1,929.86/2,663.65 = 1,091.05/x
  3. Step 3: Cross multiply
    1,929.86x = 2,663.65 × 1,091.05
  4. Step 4: Simplify right side
    1,929.86x = 2,906,175.93
  5. Step 5: Solve for x
    x = 2,906,175.93/1,929.86
  6. Step 6: Final answer
    x = 1,505.90

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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.