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Finding the Fourth Proportional to 257,811.80, 386,814.90 and 124,809.80

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Solution

The fourth proportional to 257,811.80, 386,814.90 and 124,809.80 is: 187,261.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,811.80 : 386,814.90 = 124,809.80 : x
  2. Step 2: Convert to fraction form
    257,811.80/386,814.90 = 124,809.80/x
  3. Step 3: Cross multiply
    257,811.80x = 386,814.90 × 124,809.80
  4. Step 4: Simplify right side
    257,811.80x = 48,278,290,306.02
  5. Step 5: Solve for x
    x = 48,278,290,306.02/257,811.80
  6. Step 6: Final answer
    x = 187,261.76

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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.