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Finding the Fourth Proportional to 324,910.80, 487,368.30 and 212,685.24

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Solution

The fourth proportional to 324,910.80, 487,368.30 and 212,685.24 is: 319,029.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,910.80 : 487,368.30 = 212,685.24 : x
  2. Step 2: Convert to fraction form
    324,910.80/487,368.30 = 212,685.24/x
  3. Step 3: Cross multiply
    324,910.80x = 487,368.30 × 212,685.24
  4. Step 4: Simplify right side
    324,910.80x = 103,656,043,853.89
  5. Step 5: Solve for x
    x = 103,656,043,853.89/324,910.80
  6. Step 6: Final answer
    x = 319,029.23

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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.