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Finding the Fourth Proportional to 257,847.42, 386,771.25 and 80,368.74

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Solution

The fourth proportional to 257,847.42, 386,771.25 and 80,368.74 is: 120,553.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,847.42 : 386,771.25 = 80,368.74 : x
  2. Step 2: Convert to fraction form
    257,847.42/386,771.25 = 80,368.74/x
  3. Step 3: Cross multiply
    257,847.42x = 386,771.25 × 80,368.74
  4. Step 4: Simplify right side
    257,847.42x = 31,084,318,030.73
  5. Step 5: Solve for x
    x = 31,084,318,030.73/257,847.42
  6. Step 6: Final answer
    x = 120,553.15

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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.