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Finding the Fourth Proportional to 486,351.54, 671,046.93 and 285,108.66

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Solution

The fourth proportional to 486,351.54, 671,046.93 and 285,108.66 is: 393,380.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,351.54 : 671,046.93 = 285,108.66 : x
  2. Step 2: Convert to fraction form
    486,351.54/671,046.93 = 285,108.66/x
  3. Step 3: Cross multiply
    486,351.54x = 671,046.93 × 285,108.66
  4. Step 4: Simplify right side
    486,351.54x = 191,321,291,009.41
  5. Step 5: Solve for x
    x = 191,321,291,009.41/486,351.54
  6. Step 6: Final answer
    x = 393,380.66

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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.