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Finding the Fourth Proportional to 408,935.70, 613,403.55 and 231,788.70

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Solution

The fourth proportional to 408,935.70, 613,403.55 and 231,788.70 is: 347,683.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,935.70 : 613,403.55 = 231,788.70 : x
  2. Step 2: Convert to fraction form
    408,935.70/613,403.55 = 231,788.70/x
  3. Step 3: Cross multiply
    408,935.70x = 613,403.55 × 231,788.70
  4. Step 4: Simplify right side
    408,935.70x = 142,180,011,429.89
  5. Step 5: Solve for x
    x = 142,180,011,429.89/408,935.70
  6. Step 6: Final answer
    x = 347,683.05

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1.5x scale

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.