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Finding the Fourth Proportional to 392,718.59, 589,066.11 and 108,426.48

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Solution

The fourth proportional to 392,718.59, 589,066.11 and 108,426.48 is: 162,636.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,718.59 : 589,066.11 = 108,426.48 : x
  2. Step 2: Convert to fraction form
    392,718.59/589,066.11 = 108,426.48/x
  3. Step 3: Cross multiply
    392,718.59x = 589,066.11 × 108,426.48
  4. Step 4: Simplify right side
    392,718.59x = 63,870,364,794.59
  5. Step 5: Solve for x
    x = 63,870,364,794.59/392,718.59
  6. Step 6: Final answer
    x = 162,636.47

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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.