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Finding the Fourth Proportional to 217,087.40, 325,631.10 and 207,871.40

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Solution

The fourth proportional to 217,087.40, 325,631.10 and 207,871.40 is: 311,807.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,087.40 : 325,631.10 = 207,871.40 : x
  2. Step 2: Convert to fraction form
    217,087.40/325,631.10 = 207,871.40/x
  3. Step 3: Cross multiply
    217,087.40x = 325,631.10 × 207,871.40
  4. Step 4: Simplify right side
    217,087.40x = 67,689,392,640.54
  5. Step 5: Solve for x
    x = 67,689,392,640.54/217,087.40
  6. Step 6: Final answer
    x = 311,807.10

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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.