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Finding the Fourth Proportional to 206,590.80, 309,886.20 and 143,605.20

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Solution

The fourth proportional to 206,590.80, 309,886.20 and 143,605.20 is: 215,407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,590.80 : 309,886.20 = 143,605.20 : x
  2. Step 2: Convert to fraction form
    206,590.80/309,886.20 = 143,605.20/x
  3. Step 3: Cross multiply
    206,590.80x = 309,886.20 × 143,605.20
  4. Step 4: Simplify right side
    206,590.80x = 44,501,269,728.24
  5. Step 5: Solve for x
    x = 44,501,269,728.24/206,590.80
  6. Step 6: Final answer
    x = 215,407.80

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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.