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Finding the Fourth Proportional to 259,518.40, 389,277.60 and 257,060.80

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Solution

The fourth proportional to 259,518.40, 389,277.60 and 257,060.80 is: 385,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,518.40 : 389,277.60 = 257,060.80 : x
  2. Step 2: Convert to fraction form
    259,518.40/389,277.60 = 257,060.80/x
  3. Step 3: Cross multiply
    259,518.40x = 389,277.60 × 257,060.80
  4. Step 4: Simplify right side
    259,518.40x = 100,068,011,278.08
  5. Step 5: Solve for x
    x = 100,068,011,278.08/259,518.40
  6. Step 6: Final answer
    x = 385,591.20

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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.