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Finding the Fourth Proportional to 486,618.32, 671,956.08 and 305,644.88

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Solution

The fourth proportional to 486,618.32, 671,956.08 and 305,644.88 is: 422,055.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,618.32 : 671,956.08 = 305,644.88 : x
  2. Step 2: Convert to fraction form
    486,618.32/671,956.08 = 305,644.88/x
  3. Step 3: Cross multiply
    486,618.32x = 671,956.08 × 305,644.88
  4. Step 4: Simplify right side
    486,618.32x = 205,379,935,436.87
  5. Step 5: Solve for x
    x = 205,379,935,436.87/486,618.32
  6. Step 6: Final answer
    x = 422,055.49

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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.