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Finding the Fourth Proportional to 664,443.60, 996,811.20 and 215,185.20

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Solution

The fourth proportional to 664,443.60, 996,811.20 and 215,185.20 is: 322,825.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,443.60 : 996,811.20 = 215,185.20 : x
  2. Step 2: Convert to fraction form
    664,443.60/996,811.20 = 215,185.20/x
  3. Step 3: Cross multiply
    664,443.60x = 996,811.20 × 215,185.20
  4. Step 4: Simplify right side
    664,443.60x = 214,499,017,434.24
  5. Step 5: Solve for x
    x = 214,499,017,434.24/664,443.60
  6. Step 6: Final answer
    x = 322,825.02

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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.