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Finding the Fourth Proportional to 295,279.80, 442,919.70 and 205,078.20

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Solution

The fourth proportional to 295,279.80, 442,919.70 and 205,078.20 is: 307,617.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,279.80 : 442,919.70 = 205,078.20 : x
  2. Step 2: Convert to fraction form
    295,279.80/442,919.70 = 205,078.20/x
  3. Step 3: Cross multiply
    295,279.80x = 442,919.70 × 205,078.20
  4. Step 4: Simplify right side
    295,279.80x = 90,833,174,820.54
  5. Step 5: Solve for x
    x = 90,833,174,820.54/295,279.80
  6. Step 6: Final answer
    x = 307,617.30

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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.