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Finding the Fourth Proportional to 325,335.60, 488,003.40 and 213,721.20

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Solution

The fourth proportional to 325,335.60, 488,003.40 and 213,721.20 is: 320,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,335.60 : 488,003.40 = 213,721.20 : x
  2. Step 2: Convert to fraction form
    325,335.60/488,003.40 = 213,721.20/x
  3. Step 3: Cross multiply
    325,335.60x = 488,003.40 × 213,721.20
  4. Step 4: Simplify right side
    325,335.60x = 104,296,672,252.08
  5. Step 5: Solve for x
    x = 104,296,672,252.08/325,335.60
  6. Step 6: Final answer
    x = 320,581.80

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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.