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Finding the Fourth Proportional to 389,009.52, 583,514.28 and 122,790.80

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Solution

The fourth proportional to 389,009.52, 583,514.28 and 122,790.80 is: 184,186.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,009.52 : 583,514.28 = 122,790.80 : x
  2. Step 2: Convert to fraction form
    389,009.52/583,514.28 = 122,790.80/x
  3. Step 3: Cross multiply
    389,009.52x = 583,514.28 × 122,790.80
  4. Step 4: Simplify right side
    389,009.52x = 71,650,185,252.62
  5. Step 5: Solve for x
    x = 71,650,185,252.62/389,009.52
  6. Step 6: Final answer
    x = 184,186.20

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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.