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Finding the Fourth Proportional to 669,055.54, 922,876.67 and 396,930.78

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Solution

The fourth proportional to 669,055.54, 922,876.67 and 396,930.78 is: 547,515.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,055.54 : 922,876.67 = 396,930.78 : x
  2. Step 2: Convert to fraction form
    669,055.54/922,876.67 = 396,930.78/x
  3. Step 3: Cross multiply
    669,055.54x = 922,876.67 × 396,930.78
  4. Step 4: Simplify right side
    669,055.54x = 366,318,156,466.90
  5. Step 5: Solve for x
    x = 366,318,156,466.90/669,055.54
  6. Step 6: Final answer
    x = 547,515.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.