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Finding the Fourth Proportional to 664,021.57, 993,970.62 and 359,659.82

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Solution

The fourth proportional to 664,021.57, 993,970.62 and 359,659.82 is: 538,373.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,021.57 : 993,970.62 = 359,659.82 : x
  2. Step 2: Convert to fraction form
    664,021.57/993,970.62 = 359,659.82/x
  3. Step 3: Cross multiply
    664,021.57x = 993,970.62 × 359,659.82
  4. Step 4: Simplify right side
    664,021.57x = 357,491,292,952.33
  5. Step 5: Solve for x
    x = 357,491,292,952.33/664,021.57
  6. Step 6: Final answer
    x = 538,373.01

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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.