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Finding the Fourth Proportional to 664,307.64, 996,619.65 and 215,028.60

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Solution

The fourth proportional to 664,307.64, 996,619.65 and 215,028.60 is: 322,594.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,307.64 : 996,619.65 = 215,028.60 : x
  2. Step 2: Convert to fraction form
    664,307.64/996,619.65 = 215,028.60/x
  3. Step 3: Cross multiply
    664,307.64x = 996,619.65 × 215,028.60
  4. Step 4: Simplify right side
    664,307.64x = 214,301,728,071.99
  5. Step 5: Solve for x
    x = 214,301,728,071.99/664,307.64
  6. Step 6: Final answer
    x = 322,594.10

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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.