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Finding the Fourth Proportional to 485,971.68, 729,064.32 and 149,058.72

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Solution

The fourth proportional to 485,971.68, 729,064.32 and 149,058.72 is: 223,620.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,971.68 : 729,064.32 = 149,058.72 : x
  2. Step 2: Convert to fraction form
    485,971.68/729,064.32 = 149,058.72/x
  3. Step 3: Cross multiply
    485,971.68x = 729,064.32 × 149,058.72
  4. Step 4: Simplify right side
    485,971.68x = 108,673,394,336.87
  5. Step 5: Solve for x
    x = 108,673,394,336.87/485,971.68
  6. Step 6: Final answer
    x = 223,620.84

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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.