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Finding the Fourth Proportional to 308,944.40, 431,472.40 and 308,944.40

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Solution

The fourth proportional to 308,944.40, 431,472.40 and 308,944.40 is: 431,472.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,944.40 : 431,472.40 = 308,944.40 : x
  2. Step 2: Convert to fraction form
    308,944.40/431,472.40 = 308,944.40/x
  3. Step 3: Cross multiply
    308,944.40x = 431,472.40 × 308,944.40
  4. Step 4: Simplify right side
    308,944.40x = 133,300,981,734.56
  5. Step 5: Solve for x
    x = 133,300,981,734.56/308,944.40
  6. Step 6: Final answer
    x = 431,472.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.