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Finding the Fourth Proportional to 324,638.60, 487,103.70 and 147,054.20

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Solution

The fourth proportional to 324,638.60, 487,103.70 and 147,054.20 is: 220,647.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,638.60 : 487,103.70 = 147,054.20 : x
  2. Step 2: Convert to fraction form
    324,638.60/487,103.70 = 147,054.20/x
  3. Step 3: Cross multiply
    324,638.60x = 487,103.70 × 147,054.20
  4. Step 4: Simplify right side
    324,638.60x = 71,630,644,920.54
  5. Step 5: Solve for x
    x = 71,630,644,920.54/324,638.60
  6. Step 6: Final answer
    x = 220,647.34

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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.