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Finding the Fourth Proportional to 379,169.65, 523,257.69 and 215,818.19

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Solution

The fourth proportional to 379,169.65, 523,257.69 and 215,818.19 is: 297,831.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,169.65 : 523,257.69 = 215,818.19 : x
  2. Step 2: Convert to fraction form
    379,169.65/523,257.69 = 215,818.19/x
  3. Step 3: Cross multiply
    379,169.65x = 523,257.69 × 215,818.19
  4. Step 4: Simplify right side
    379,169.65x = 112,928,527,559.38
  5. Step 5: Solve for x
    x = 112,928,527,559.38/379,169.65
  6. Step 6: Final answer
    x = 297,831.14

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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.