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Finding the Fourth Proportional to 217,468.80, 305,078.40 and 217,468.80

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Solution

The fourth proportional to 217,468.80, 305,078.40 and 217,468.80 is: 305,078.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,468.80 : 305,078.40 = 217,468.80 : x
  2. Step 2: Convert to fraction form
    217,468.80/305,078.40 = 217,468.80/x
  3. Step 3: Cross multiply
    217,468.80x = 305,078.40 × 217,468.80
  4. Step 4: Simplify right side
    217,468.80x = 66,345,033,553.92
  5. Step 5: Solve for x
    x = 66,345,033,553.92/217,468.80
  6. Step 6: Final answer
    x = 305,078.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.