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Finding the Fourth Proportional to 449,139.60, 672,931.80 and 291,286.80

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Solution

The fourth proportional to 449,139.60, 672,931.80 and 291,286.80 is: 436,425.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,139.60 : 672,931.80 = 291,286.80 : x
  2. Step 2: Convert to fraction form
    449,139.60/672,931.80 = 291,286.80/x
  3. Step 3: Cross multiply
    449,139.60x = 672,931.80 × 291,286.80
  4. Step 4: Simplify right side
    449,139.60x = 196,016,150,640.24
  5. Step 5: Solve for x
    x = 196,016,150,640.24/449,139.60
  6. Step 6: Final answer
    x = 436,425.89

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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.