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Finding the Fourth Proportional to 656,906.40, 985,129.20 and 341,258.40

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Solution

The fourth proportional to 656,906.40, 985,129.20 and 341,258.40 is: 511,767.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,906.40 : 985,129.20 = 341,258.40 : x
  2. Step 2: Convert to fraction form
    656,906.40/985,129.20 = 341,258.40/x
  3. Step 3: Cross multiply
    656,906.40x = 985,129.20 × 341,258.40
  4. Step 4: Simplify right side
    656,906.40x = 336,183,614,585.28
  5. Step 5: Solve for x
    x = 336,183,614,585.28/656,906.40
  6. Step 6: Final answer
    x = 511,767.91

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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.