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Finding the Fourth Proportional to 389,007.52, 583,511.28 and 122,788.80

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Solution

The fourth proportional to 389,007.52, 583,511.28 and 122,788.80 is: 184,183.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,007.52 : 583,511.28 = 122,788.80 : x
  2. Step 2: Convert to fraction form
    389,007.52/583,511.28 = 122,788.80/x
  3. Step 3: Cross multiply
    389,007.52x = 583,511.28 × 122,788.80
  4. Step 4: Simplify right side
    389,007.52x = 71,648,649,857.66
  5. Step 5: Solve for x
    x = 71,648,649,857.66/389,007.52
  6. Step 6: Final answer
    x = 184,183.20

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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.