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Finding the Fourth Proportional to 257,503.31, 355,318.62 and 149,990.39

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Solution

The fourth proportional to 257,503.31, 355,318.62 and 149,990.39 is: 206,965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,503.31 : 355,318.62 = 149,990.39 : x
  2. Step 2: Convert to fraction form
    257,503.31/355,318.62 = 149,990.39/x
  3. Step 3: Cross multiply
    257,503.31x = 355,318.62 × 149,990.39
  4. Step 4: Simplify right side
    257,503.31x = 53,294,378,388.06
  5. Step 5: Solve for x
    x = 53,294,378,388.06/257,503.31
  6. Step 6: Final answer
    x = 206,965.80

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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.