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Finding the Fourth Proportional to 485,267.52, 727,408.80 and 185,671.20

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Solution

The fourth proportional to 485,267.52, 727,408.80 and 185,671.20 is: 278,318.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,267.52 : 727,408.80 = 185,671.20 : x
  2. Step 2: Convert to fraction form
    485,267.52/727,408.80 = 185,671.20/x
  3. Step 3: Cross multiply
    485,267.52x = 727,408.80 × 185,671.20
  4. Step 4: Simplify right side
    485,267.52x = 135,058,864,786.56
  5. Step 5: Solve for x
    x = 135,058,864,786.56/485,267.52
  6. Step 6: Final answer
    x = 278,318.37

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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.