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Finding the Fourth Proportional to 858,796.60, 1,288,778.10 and 479,716.60

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Solution

The fourth proportional to 858,796.60, 1,288,778.10 and 479,716.60 is: 719,900.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,796.60 : 1,288,778.10 = 479,716.60 : x
  2. Step 2: Convert to fraction form
    858,796.60/1,288,778.10 = 479,716.60/x
  3. Step 3: Cross multiply
    858,796.60x = 1,288,778.10 × 479,716.60
  4. Step 4: Simplify right side
    858,796.60x = 618,248,248,286.46
  5. Step 5: Solve for x
    x = 618,248,248,286.46/858,796.60
  6. Step 6: Final answer
    x = 719,900.67

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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.