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Finding the Fourth Proportional to 259,566.40, 389,349.60 and 257,816.80

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Solution

The fourth proportional to 259,566.40, 389,349.60 and 257,816.80 is: 386,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,566.40 : 389,349.60 = 257,816.80 : x
  2. Step 2: Convert to fraction form
    259,566.40/389,349.60 = 257,816.80/x
  3. Step 3: Cross multiply
    259,566.40x = 389,349.60 × 257,816.80
  4. Step 4: Simplify right side
    259,566.40x = 100,380,867,953.28
  5. Step 5: Solve for x
    x = 100,380,867,953.28/259,566.40
  6. Step 6: Final answer
    x = 386,725.20

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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.