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Finding the Fourth Proportional to 325,616.13, 488,965.47 and 219,681.60

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Solution

The fourth proportional to 325,616.13, 488,965.47 and 219,681.60 is: 329,887.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,616.13 : 488,965.47 = 219,681.60 : x
  2. Step 2: Convert to fraction form
    325,616.13/488,965.47 = 219,681.60/x
  3. Step 3: Cross multiply
    325,616.13x = 488,965.47 × 219,681.60
  4. Step 4: Simplify right side
    325,616.13x = 107,416,716,794.35
  5. Step 5: Solve for x
    x = 107,416,716,794.35/325,616.13
  6. Step 6: Final answer
    x = 329,887.58

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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.