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Finding the Fourth Proportional to 324,829.60, 487,244.40 and 212,855.20

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Solution

The fourth proportional to 324,829.60, 487,244.40 and 212,855.20 is: 319,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,829.60 : 487,244.40 = 212,855.20 : x
  2. Step 2: Convert to fraction form
    324,829.60/487,244.40 = 212,855.20/x
  3. Step 3: Cross multiply
    324,829.60x = 487,244.40 × 212,855.20
  4. Step 4: Simplify right side
    324,829.60x = 103,712,504,210.88
  5. Step 5: Solve for x
    x = 103,712,504,210.88/324,829.60
  6. Step 6: Final answer
    x = 319,282.80

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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.