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Finding the Fourth Proportional to 679,485.16, 1,019,375.84 and 206,207.56

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Solution

The fourth proportional to 679,485.16, 1,019,375.84 and 206,207.56 is: 309,356.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,485.16 : 1,019,375.84 = 206,207.56 : x
  2. Step 2: Convert to fraction form
    679,485.16/1,019,375.84 = 206,207.56/x
  3. Step 3: Cross multiply
    679,485.16x = 1,019,375.84 × 206,207.56
  4. Step 4: Simplify right side
    679,485.16x = 210,203,004,689.35
  5. Step 5: Solve for x
    x = 210,203,004,689.35/679,485.16
  6. Step 6: Final answer
    x = 309,356.28

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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.