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Finding the Fourth Proportional to 392,805.53, 589,196.60 and 108,513.19

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Solution

The fourth proportional to 392,805.53, 589,196.60 and 108,513.19 is: 162,766.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,805.53 : 589,196.60 = 108,513.19 : x
  2. Step 2: Convert to fraction form
    392,805.53/589,196.60 = 108,513.19/x
  3. Step 3: Cross multiply
    392,805.53x = 589,196.60 × 108,513.19
  4. Step 4: Simplify right side
    392,805.53x = 63,935,600,587.60
  5. Step 5: Solve for x
    x = 63,935,600,587.60/392,805.53
  6. Step 6: Final answer
    x = 162,766.55

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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.