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Finding the Fourth Proportional to 493,979.72, 681,683.13 and 279,115.16

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Solution

The fourth proportional to 493,979.72, 681,683.13 and 279,115.16 is: 385,173.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,979.72 : 681,683.13 = 279,115.16 : x
  2. Step 2: Convert to fraction form
    493,979.72/681,683.13 = 279,115.16/x
  3. Step 3: Cross multiply
    493,979.72x = 681,683.13 × 279,115.16
  4. Step 4: Simplify right side
    493,979.72x = 190,268,092,490.84
  5. Step 5: Solve for x
    x = 190,268,092,490.84/493,979.72
  6. Step 6: Final answer
    x = 385,173.90

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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.