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Finding the Fourth Proportional to 305,801.68, 421,992 and 169,844.40

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Solution

The fourth proportional to 305,801.68, 421,992 and 169,844.40 is: 234,377.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,801.68 : 421,992 = 169,844.40 : x
  2. Step 2: Convert to fraction form
    305,801.68/421,992 = 169,844.40/x
  3. Step 3: Cross multiply
    305,801.68x = 421,992 × 169,844.40
  4. Step 4: Simplify right side
    305,801.68x = 71,672,978,044.80
  5. Step 5: Solve for x
    x = 71,672,978,044.80/305,801.68
  6. Step 6: Final answer
    x = 234,377.32

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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.