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Finding the Fourth Proportional to 664,364.30, 996,643.65 and 215,008.70

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Solution

The fourth proportional to 664,364.30, 996,643.65 and 215,008.70 is: 322,544.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,364.30 : 996,643.65 = 215,008.70 : x
  2. Step 2: Convert to fraction form
    664,364.30/996,643.65 = 215,008.70/x
  3. Step 3: Cross multiply
    664,364.30x = 996,643.65 × 215,008.70
  4. Step 4: Simplify right side
    664,364.30x = 214,287,055,549.76
  5. Step 5: Solve for x
    x = 214,287,055,549.76/664,364.30
  6. Step 6: Final answer
    x = 322,544.51

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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.