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Finding the Fourth Proportional to 664,298.40, 996,447.60 and 439,912.20

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Solution

The fourth proportional to 664,298.40, 996,447.60 and 439,912.20 is: 659,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,298.40 : 996,447.60 = 439,912.20 : x
  2. Step 2: Convert to fraction form
    664,298.40/996,447.60 = 439,912.20/x
  3. Step 3: Cross multiply
    664,298.40x = 996,447.60 × 439,912.20
  4. Step 4: Simplify right side
    664,298.40x = 438,349,455,900.72
  5. Step 5: Solve for x
    x = 438,349,455,900.72/664,298.40
  6. Step 6: Final answer
    x = 659,868.30

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Similar ratio
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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.