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Finding the Fourth Proportional to 325,357.20, 487,962.90 and 213,820.20

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Solution

The fourth proportional to 325,357.20, 487,962.90 and 213,820.20 is: 320,682.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,357.20 : 487,962.90 = 213,820.20 : x
  2. Step 2: Convert to fraction form
    325,357.20/487,962.90 = 213,820.20/x
  3. Step 3: Cross multiply
    325,357.20x = 487,962.90 × 213,820.20
  4. Step 4: Simplify right side
    325,357.20x = 104,336,324,870.58
  5. Step 5: Solve for x
    x = 104,336,324,870.58/325,357.20
  6. Step 6: Final answer
    x = 320,682.39

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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.