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Finding the Fourth Proportional to 307,963.46, 425,119.14 and 187,143.56

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Solution

The fourth proportional to 307,963.46, 425,119.14 and 187,143.56 is: 258,336.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,963.46 : 425,119.14 = 187,143.56 : x
  2. Step 2: Convert to fraction form
    307,963.46/425,119.14 = 187,143.56/x
  3. Step 3: Cross multiply
    307,963.46x = 425,119.14 × 187,143.56
  4. Step 4: Simplify right side
    307,963.46x = 79,558,309,283.74
  5. Step 5: Solve for x
    x = 79,558,309,283.74/307,963.46
  6. Step 6: Final answer
    x = 258,336.85

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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.