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Finding the Fourth Proportional to 386,580.80, 579,871.20 and 162,194.60

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Solution

The fourth proportional to 386,580.80, 579,871.20 and 162,194.60 is: 243,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,580.80 : 579,871.20 = 162,194.60 : x
  2. Step 2: Convert to fraction form
    386,580.80/579,871.20 = 162,194.60/x
  3. Step 3: Cross multiply
    386,580.80x = 579,871.20 × 162,194.60
  4. Step 4: Simplify right side
    386,580.80x = 94,051,977,335.52
  5. Step 5: Solve for x
    x = 94,051,977,335.52/386,580.80
  6. Step 6: Final answer
    x = 243,291.90

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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.