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Finding the Fourth Proportional to 315,143.49, 434,880.51 and 179,158.56

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Solution

The fourth proportional to 315,143.49, 434,880.51 and 179,158.56 is: 247,228.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,143.49 : 434,880.51 = 179,158.56 : x
  2. Step 2: Convert to fraction form
    315,143.49/434,880.51 = 179,158.56/x
  3. Step 3: Cross multiply
    315,143.49x = 434,880.51 × 179,158.56
  4. Step 4: Simplify right side
    315,143.49x = 77,912,566,391.56
  5. Step 5: Solve for x
    x = 77,912,566,391.56/315,143.49
  6. Step 6: Final answer
    x = 247,228.87

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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.