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Finding the Fourth Proportional to 217,270.40, 325,711.20 and 142,426.40

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Solution

The fourth proportional to 217,270.40, 325,711.20 and 142,426.40 is: 213,512.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,270.40 : 325,711.20 = 142,426.40 : x
  2. Step 2: Convert to fraction form
    217,270.40/325,711.20 = 142,426.40/x
  3. Step 3: Cross multiply
    217,270.40x = 325,711.20 × 142,426.40
  4. Step 4: Simplify right side
    217,270.40x = 46,389,873,655.68
  5. Step 5: Solve for x
    x = 46,389,873,655.68/217,270.40
  6. Step 6: Final answer
    x = 213,512.17

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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.