Home / 792,139.80-1,188,792.90-319,164.60

Finding the Fourth Proportional to 792,139.80, 1,188,792.90 and 319,164.60

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Solution

The fourth proportional to 792,139.80, 1,188,792.90 and 319,164.60 is: 478,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    792,139.80 : 1,188,792.90 = 319,164.60 : x
  2. Step 2: Convert to fraction form
    792,139.80/1,188,792.90 = 319,164.60/x
  3. Step 3: Cross multiply
    792,139.80x = 1,188,792.90 × 319,164.60
  4. Step 4: Simplify right side
    792,139.80x = 379,420,610,411.34
  5. Step 5: Solve for x
    x = 379,420,610,411.34/792,139.80
  6. Step 6: Final answer
    x = 478,981.88

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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.