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Finding the Fourth Proportional to 309,392.01, 426,978.45 and 173,469.96

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Solution

The fourth proportional to 309,392.01, 426,978.45 and 173,469.96 is: 239,398.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,392.01 : 426,978.45 = 173,469.96 : x
  2. Step 2: Convert to fraction form
    309,392.01/426,978.45 = 173,469.96/x
  3. Step 3: Cross multiply
    309,392.01x = 426,978.45 × 173,469.96
  4. Step 4: Simplify right side
    309,392.01x = 74,067,934,642.36
  5. Step 5: Solve for x
    x = 74,067,934,642.36/309,392.01
  6. Step 6: Final answer
    x = 239,398.34

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1.5x scale

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.