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Finding the Fourth Proportional to 259,660.60, 389,490.90 and 254,411.80

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Solution

The fourth proportional to 259,660.60, 389,490.90 and 254,411.80 is: 381,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,660.60 : 389,490.90 = 254,411.80 : x
  2. Step 2: Convert to fraction form
    259,660.60/389,490.90 = 254,411.80/x
  3. Step 3: Cross multiply
    259,660.60x = 389,490.90 × 254,411.80
  4. Step 4: Simplify right side
    259,660.60x = 99,091,080,952.62
  5. Step 5: Solve for x
    x = 99,091,080,952.62/259,660.60
  6. Step 6: Final answer
    x = 381,617.70

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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.