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Finding the Fourth Proportional to 257,737.28, 355,679.37 and 143,016.39

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Solution

The fourth proportional to 257,737.28, 355,679.37 and 143,016.39 is: 197,363.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,737.28 : 355,679.37 = 143,016.39 : x
  2. Step 2: Convert to fraction form
    257,737.28/355,679.37 = 143,016.39/x
  3. Step 3: Cross multiply
    257,737.28x = 355,679.37 × 143,016.39
  4. Step 4: Simplify right side
    257,737.28x = 50,867,979,494.87
  5. Step 5: Solve for x
    x = 50,867,979,494.87/257,737.28
  6. Step 6: Final answer
    x = 197,363.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.