Home / 1,126.86-1,553.67-905.82

Finding the Fourth Proportional to 1,126.86, 1,553.67 and 905.82

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Solution

The fourth proportional to 1,126.86, 1,553.67 and 905.82 is: 1,248.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.86 : 1,553.67 = 905.82 : x
  2. Step 2: Convert to fraction form
    1,126.86/1,553.67 = 905.82/x
  3. Step 3: Cross multiply
    1,126.86x = 1,553.67 × 905.82
  4. Step 4: Simplify right side
    1,126.86x = 1,407,345.36
  5. Step 5: Solve for x
    x = 1,407,345.36/1,126.86
  6. Step 6: Final answer
    x = 1,248.91

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1.5x scale

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.