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Finding the Fourth Proportional to 393,376.65, 589,920.29 and 140,588.81

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Solution

The fourth proportional to 393,376.65, 589,920.29 and 140,588.81 is: 210,831.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,376.65 : 589,920.29 = 140,588.81 : x
  2. Step 2: Convert to fraction form
    393,376.65/589,920.29 = 140,588.81/x
  3. Step 3: Cross multiply
    393,376.65x = 589,920.29 × 140,588.81
  4. Step 4: Simplify right side
    393,376.65x = 82,936,192,865.02
  5. Step 5: Solve for x
    x = 82,936,192,865.02/393,376.65
  6. Step 6: Final answer
    x = 210,831.51

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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.