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Finding the Fourth Proportional to 257,797.96, 386,668.28 and 80,290.12

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Solution

The fourth proportional to 257,797.96, 386,668.28 and 80,290.12 is: 120,426.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,797.96 : 386,668.28 = 80,290.12 : x
  2. Step 2: Convert to fraction form
    257,797.96/386,668.28 = 80,290.12/x
  3. Step 3: Cross multiply
    257,797.96x = 386,668.28 × 80,290.12
  4. Step 4: Simplify right side
    257,797.96x = 31,045,642,601.39
  5. Step 5: Solve for x
    x = 31,045,642,601.39/257,797.96
  6. Step 6: Final answer
    x = 120,426.25

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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.