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Finding the Fourth Proportional to 1,641.86, 2,266.07 and 933.78

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Solution

The fourth proportional to 1,641.86, 2,266.07 and 933.78 is: 1,288.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.86 : 2,266.07 = 933.78 : x
  2. Step 2: Convert to fraction form
    1,641.86/2,266.07 = 933.78/x
  3. Step 3: Cross multiply
    1,641.86x = 2,266.07 × 933.78
  4. Step 4: Simplify right side
    1,641.86x = 2,116,006.18
  5. Step 5: Solve for x
    x = 2,116,006.18/1,641.86
  6. Step 6: Final answer
    x = 1,288.79

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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.