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Finding the Fourth Proportional to 324,717.60, 487,076.40 and 212,743.20

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Solution

The fourth proportional to 324,717.60, 487,076.40 and 212,743.20 is: 319,114.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,717.60 : 487,076.40 = 212,743.20 : x
  2. Step 2: Convert to fraction form
    324,717.60/487,076.40 = 212,743.20/x
  3. Step 3: Cross multiply
    324,717.60x = 487,076.40 × 212,743.20
  4. Step 4: Simplify right side
    324,717.60x = 103,622,191,980.48
  5. Step 5: Solve for x
    x = 103,622,191,980.48/324,717.60
  6. Step 6: Final answer
    x = 319,114.80

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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.