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Finding the Fourth Proportional to 206,999.20, 310,498.80 and 172,007.20

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Solution

The fourth proportional to 206,999.20, 310,498.80 and 172,007.20 is: 258,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,999.20 : 310,498.80 = 172,007.20 : x
  2. Step 2: Convert to fraction form
    206,999.20/310,498.80 = 172,007.20/x
  3. Step 3: Cross multiply
    206,999.20x = 310,498.80 × 172,007.20
  4. Step 4: Simplify right side
    206,999.20x = 53,408,029,191.36
  5. Step 5: Solve for x
    x = 53,408,029,191.36/206,999.20
  6. Step 6: Final answer
    x = 258,010.80

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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.