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Finding the Fourth Proportional to 922,078.60, 1,383,117.90 and 620,928.70

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Solution

The fourth proportional to 922,078.60, 1,383,117.90 and 620,928.70 is: 931,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,078.60 : 1,383,117.90 = 620,928.70 : x
  2. Step 2: Convert to fraction form
    922,078.60/1,383,117.90 = 620,928.70/x
  3. Step 3: Cross multiply
    922,078.60x = 1,383,117.90 × 620,928.70
  4. Step 4: Simplify right side
    922,078.60x = 858,817,599,593.73
  5. Step 5: Solve for x
    x = 858,817,599,593.73/922,078.60
  6. Step 6: Final answer
    x = 931,393.05

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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.