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Finding the Fourth Proportional to 395,999.80, 592,962.90 and 290,246.20

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Solution

The fourth proportional to 395,999.80, 592,962.90 and 290,246.20 is: 434,609.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,999.80 : 592,962.90 = 290,246.20 : x
  2. Step 2: Convert to fraction form
    395,999.80/592,962.90 = 290,246.20/x
  3. Step 3: Cross multiply
    395,999.80x = 592,962.90 × 290,246.20
  4. Step 4: Simplify right side
    395,999.80x = 172,105,228,465.98
  5. Step 5: Solve for x
    x = 172,105,228,465.98/395,999.80
  6. Step 6: Final answer
    x = 434,609.38

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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.