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Finding the Fourth Proportional to 259,350.80, 389,026.20 and 257,712.40

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Solution

The fourth proportional to 259,350.80, 389,026.20 and 257,712.40 is: 386,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,350.80 : 389,026.20 = 257,712.40 : x
  2. Step 2: Convert to fraction form
    259,350.80/389,026.20 = 257,712.40/x
  3. Step 3: Cross multiply
    259,350.80x = 389,026.20 × 257,712.40
  4. Step 4: Simplify right side
    259,350.80x = 100,256,875,664.88
  5. Step 5: Solve for x
    x = 100,256,875,664.88/259,350.80
  6. Step 6: Final answer
    x = 386,568.60

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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.