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Finding the Fourth Proportional to 257,807.70, 386,711.55 and 107,998.20

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Solution

The fourth proportional to 257,807.70, 386,711.55 and 107,998.20 is: 161,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,807.70 : 386,711.55 = 107,998.20 : x
  2. Step 2: Convert to fraction form
    257,807.70/386,711.55 = 107,998.20/x
  3. Step 3: Cross multiply
    257,807.70x = 386,711.55 × 107,998.20
  4. Step 4: Simplify right side
    257,807.70x = 41,764,151,319.21
  5. Step 5: Solve for x
    x = 41,764,151,319.21/257,807.70
  6. Step 6: Final answer
    x = 161,997.30

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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.