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Finding the Fourth Proportional to 664,712.60, 996,859.76 and 215,329.21

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Solution

The fourth proportional to 664,712.60, 996,859.76 and 215,329.21 is: 322,926.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,712.60 : 996,859.76 = 215,329.21 : x
  2. Step 2: Convert to fraction form
    664,712.60/996,859.76 = 215,329.21/x
  3. Step 3: Cross multiply
    664,712.60x = 996,859.76 × 215,329.21
  4. Step 4: Simplify right side
    664,712.60x = 214,653,024,601.59
  5. Step 5: Solve for x
    x = 214,653,024,601.59/664,712.60
  6. Step 6: Final answer
    x = 322,926.07

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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.