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Finding the Fourth Proportional to 392,920.20, 589,380.30 and 350,929.80

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Solution

The fourth proportional to 392,920.20, 589,380.30 and 350,929.80 is: 526,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,920.20 : 589,380.30 = 350,929.80 : x
  2. Step 2: Convert to fraction form
    392,920.20/589,380.30 = 350,929.80/x
  3. Step 3: Cross multiply
    392,920.20x = 589,380.30 × 350,929.80
  4. Step 4: Simplify right side
    392,920.20x = 206,831,110,802.94
  5. Step 5: Solve for x
    x = 206,831,110,802.94/392,920.20
  6. Step 6: Final answer
    x = 526,394.70

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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.