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Finding the Fourth Proportional to 2,939.86, 4,409.80 and 993.42

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Solution

The fourth proportional to 2,939.86, 4,409.80 and 993.42 is: 1,490.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.86 : 4,409.80 = 993.42 : x
  2. Step 2: Convert to fraction form
    2,939.86/4,409.80 = 993.42/x
  3. Step 3: Cross multiply
    2,939.86x = 4,409.80 × 993.42
  4. Step 4: Simplify right side
    2,939.86x = 4,380,783.52
  5. Step 5: Solve for x
    x = 4,380,783.52/2,939.86
  6. Step 6: Final answer
    x = 1,490.13

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1.5x scale

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.