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Finding the Fourth Proportional to 217,278.10, 325,917.15 and 209,404.90

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Solution

The fourth proportional to 217,278.10, 325,917.15 and 209,404.90 is: 314,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,278.10 : 325,917.15 = 209,404.90 : x
  2. Step 2: Convert to fraction form
    217,278.10/325,917.15 = 209,404.90/x
  3. Step 3: Cross multiply
    217,278.10x = 325,917.15 × 209,404.90
  4. Step 4: Simplify right side
    217,278.10x = 68,248,648,204.04
  5. Step 5: Solve for x
    x = 68,248,648,204.04/217,278.10
  6. Step 6: Final answer
    x = 314,107.35

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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.