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Finding the Fourth Proportional to 292,942.20, 439,326.90 and 115,390.20

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Solution

The fourth proportional to 292,942.20, 439,326.90 and 115,390.20 is: 173,051.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,942.20 : 439,326.90 = 115,390.20 : x
  2. Step 2: Convert to fraction form
    292,942.20/439,326.90 = 115,390.20/x
  3. Step 3: Cross multiply
    292,942.20x = 439,326.90 × 115,390.20
  4. Step 4: Simplify right side
    292,942.20x = 50,694,018,856.38
  5. Step 5: Solve for x
    x = 50,694,018,856.38/292,942.20
  6. Step 6: Final answer
    x = 173,051.27

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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.