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Finding the Fourth Proportional to 679,866, 1,019,820.60 and 206,555.46

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Solution

The fourth proportional to 679,866, 1,019,820.60 and 206,555.46 is: 309,839.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,866 : 1,019,820.60 = 206,555.46 : x
  2. Step 2: Convert to fraction form
    679,866/1,019,820.60 = 206,555.46/x
  3. Step 3: Cross multiply
    679,866x = 1,019,820.60 × 206,555.46
  4. Step 4: Simplify right side
    679,866x = 210,649,513,150.48
  5. Step 5: Solve for x
    x = 210,649,513,150.48/679,866
  6. Step 6: Final answer
    x = 309,839.75

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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.