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Finding the Fourth Proportional to 486,885.56, 729,239.31 and 281,468.51

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Solution

The fourth proportional to 486,885.56, 729,239.31 and 281,468.51 is: 421,573.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,885.56 : 729,239.31 = 281,468.51 : x
  2. Step 2: Convert to fraction form
    486,885.56/729,239.31 = 281,468.51/x
  3. Step 3: Cross multiply
    486,885.56x = 729,239.31 × 281,468.51
  4. Step 4: Simplify right side
    486,885.56x = 205,257,902,019.13
  5. Step 5: Solve for x
    x = 205,257,902,019.13/486,885.56
  6. Step 6: Final answer
    x = 421,573.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.