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Finding the Fourth Proportional to 664,710.57, 996,856.71 and 215,327.17

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Solution

The fourth proportional to 664,710.57, 996,856.71 and 215,327.17 is: 322,923.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,710.57 : 996,856.71 = 215,327.17 : x
  2. Step 2: Convert to fraction form
    664,710.57/996,856.71 = 215,327.17/x
  3. Step 3: Cross multiply
    664,710.57x = 996,856.71 × 215,327.17
  4. Step 4: Simplify right side
    664,710.57x = 214,650,338,182.47
  5. Step 5: Solve for x
    x = 214,650,338,182.47/664,710.57
  6. Step 6: Final answer
    x = 322,923.01

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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.