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Finding the Fourth Proportional to 209,010.20, 313,320.90 and 145,830.20

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Solution

The fourth proportional to 209,010.20, 313,320.90 and 145,830.20 is: 218,609.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,010.20 : 313,320.90 = 145,830.20 : x
  2. Step 2: Convert to fraction form
    209,010.20/313,320.90 = 145,830.20/x
  3. Step 3: Cross multiply
    209,010.20x = 313,320.90 × 145,830.20
  4. Step 4: Simplify right side
    209,010.20x = 45,691,649,511.18
  5. Step 5: Solve for x
    x = 45,691,649,511.18/209,010.20
  6. Step 6: Final answer
    x = 218,609.66

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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.