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Finding the Fourth Proportional to 664,502.78, 996,851.99 and 215,074.28

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Solution

The fourth proportional to 664,502.78, 996,851.99 and 215,074.28 is: 322,643.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,502.78 : 996,851.99 = 215,074.28 : x
  2. Step 2: Convert to fraction form
    664,502.78/996,851.99 = 215,074.28/x
  3. Step 3: Cross multiply
    664,502.78x = 996,851.99 × 215,074.28
  4. Step 4: Simplify right side
    664,502.78x = 214,397,224,015.82
  5. Step 5: Solve for x
    x = 214,397,224,015.82/664,502.78
  6. Step 6: Final answer
    x = 322,643.08

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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.