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Finding the Fourth Proportional to 315,527.81, 435,426.64 and 172,286.83

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Solution

The fourth proportional to 315,527.81, 435,426.64 and 172,286.83 is: 237,754.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,527.81 : 435,426.64 = 172,286.83 : x
  2. Step 2: Convert to fraction form
    315,527.81/435,426.64 = 172,286.83/x
  3. Step 3: Cross multiply
    315,527.81x = 435,426.64 × 172,286.83
  4. Step 4: Simplify right side
    315,527.81x = 75,018,275,616.72
  5. Step 5: Solve for x
    x = 75,018,275,616.72/315,527.81
  6. Step 6: Final answer
    x = 237,754.88

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1.5x scale

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.