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Finding the Fourth Proportional to 290,005.16, 399,976.26 and 239,616.68

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Solution

The fourth proportional to 290,005.16, 399,976.26 and 239,616.68 is: 330,480.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,005.16 : 399,976.26 = 239,616.68 : x
  2. Step 2: Convert to fraction form
    290,005.16/399,976.26 = 239,616.68/x
  3. Step 3: Cross multiply
    290,005.16x = 399,976.26 × 239,616.68
  4. Step 4: Simplify right side
    290,005.16x = 95,840,983,500.02
  5. Step 5: Solve for x
    x = 95,840,983,500.02/290,005.16
  6. Step 6: Final answer
    x = 330,480.27

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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.