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Finding the Fourth Proportional to 830,500.40, 1,245,289.80 and 331,300.40

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Solution

The fourth proportional to 830,500.40, 1,245,289.80 and 331,300.40 is: 496,766.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,500.40 : 1,245,289.80 = 331,300.40 : x
  2. Step 2: Convert to fraction form
    830,500.40/1,245,289.80 = 331,300.40/x
  3. Step 3: Cross multiply
    830,500.40x = 1,245,289.80 × 331,300.40
  4. Step 4: Simplify right side
    830,500.40x = 412,565,008,855.92
  5. Step 5: Solve for x
    x = 412,565,008,855.92/830,500.40
  6. Step 6: Final answer
    x = 496,766.78

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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.