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Finding the Fourth Proportional to 395,998.80, 592,961.40 and 290,245.20

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Solution

The fourth proportional to 395,998.80, 592,961.40 and 290,245.20 is: 434,607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,998.80 : 592,961.40 = 290,245.20 : x
  2. Step 2: Convert to fraction form
    395,998.80/592,961.40 = 290,245.20/x
  3. Step 3: Cross multiply
    395,998.80x = 592,961.40 × 290,245.20
  4. Step 4: Simplify right side
    395,998.80x = 172,104,200,135.28
  5. Step 5: Solve for x
    x = 172,104,200,135.28/395,998.80
  6. Step 6: Final answer
    x = 434,607.88

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1.5x scale

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.