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Finding the Fourth Proportional to 257,519.70, 386,279.55 and 247,022.10

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Solution

The fourth proportional to 257,519.70, 386,279.55 and 247,022.10 is: 370,533.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,519.70 : 386,279.55 = 247,022.10 : x
  2. Step 2: Convert to fraction form
    257,519.70/386,279.55 = 247,022.10/x
  3. Step 3: Cross multiply
    257,519.70x = 386,279.55 × 247,022.10
  4. Step 4: Simplify right side
    257,519.70x = 95,419,585,628.06
  5. Step 5: Solve for x
    x = 95,419,585,628.06/257,519.70
  6. Step 6: Final answer
    x = 370,533.15

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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.