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Finding the Fourth Proportional to 324,694.80, 487,042.20 and 212,720.40

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Solution

The fourth proportional to 324,694.80, 487,042.20 and 212,720.40 is: 319,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,694.80 : 487,042.20 = 212,720.40 : x
  2. Step 2: Convert to fraction form
    324,694.80/487,042.20 = 212,720.40/x
  3. Step 3: Cross multiply
    324,694.80x = 487,042.20 × 212,720.40
  4. Step 4: Simplify right side
    324,694.80x = 103,603,811,600.88
  5. Step 5: Solve for x
    x = 103,603,811,600.88/324,694.80
  6. Step 6: Final answer
    x = 319,080.60

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1.5x scale

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.