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Finding the Fourth Proportional to 664,507.78, 996,859.49 and 215,079.28

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Solution

The fourth proportional to 664,507.78, 996,859.49 and 215,079.28 is: 322,650.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,507.78 : 996,859.49 = 215,079.28 : x
  2. Step 2: Convert to fraction form
    664,507.78/996,859.49 = 215,079.28/x
  3. Step 3: Cross multiply
    664,507.78x = 996,859.49 × 215,079.28
  4. Step 4: Simplify right side
    664,507.78x = 214,403,821,370.37
  5. Step 5: Solve for x
    x = 214,403,821,370.37/664,507.78
  6. Step 6: Final answer
    x = 322,650.58

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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.