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Finding the Fourth Proportional to 315,527.62, 435,426.38 and 172,286.64

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Solution

The fourth proportional to 315,527.62, 435,426.38 and 172,286.64 is: 237,754.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,527.62 : 435,426.38 = 172,286.64 : x
  2. Step 2: Convert to fraction form
    315,527.62/435,426.38 = 172,286.64/x
  3. Step 3: Cross multiply
    315,527.62x = 435,426.38 × 172,286.64
  4. Step 4: Simplify right side
    315,527.62x = 75,018,149,395.05
  5. Step 5: Solve for x
    x = 75,018,149,395.05/315,527.62
  6. Step 6: Final answer
    x = 237,754.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.