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Finding the Fourth Proportional to 342,471.80, 472,555.86 and 215,057.18

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Solution

The fourth proportional to 342,471.80, 472,555.86 and 215,057.18 is: 296,744.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,471.80 : 472,555.86 = 215,057.18 : x
  2. Step 2: Convert to fraction form
    342,471.80/472,555.86 = 215,057.18/x
  3. Step 3: Cross multiply
    342,471.80x = 472,555.86 × 215,057.18
  4. Step 4: Simplify right side
    342,471.80x = 101,626,530,644.08
  5. Step 5: Solve for x
    x = 101,626,530,644.08/342,471.80
  6. Step 6: Final answer
    x = 296,744.23

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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.