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Finding the Fourth Proportional to 922,079.80, 1,383,119.70 and 638,644.60

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Solution

The fourth proportional to 922,079.80, 1,383,119.70 and 638,644.60 is: 957,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,079.80 : 1,383,119.70 = 638,644.60 : x
  2. Step 2: Convert to fraction form
    922,079.80/1,383,119.70 = 638,644.60/x
  3. Step 3: Cross multiply
    922,079.80x = 1,383,119.70 × 638,644.60
  4. Step 4: Simplify right side
    922,079.80x = 883,321,927,558.62
  5. Step 5: Solve for x
    x = 883,321,927,558.62/922,079.80
  6. Step 6: Final answer
    x = 957,966.90

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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.