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Finding the Fourth Proportional to 439,746.80, 659,620.20 and 328,209.80

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Solution

The fourth proportional to 439,746.80, 659,620.20 and 328,209.80 is: 492,314.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,746.80 : 659,620.20 = 328,209.80 : x
  2. Step 2: Convert to fraction form
    439,746.80/659,620.20 = 328,209.80/x
  3. Step 3: Cross multiply
    439,746.80x = 659,620.20 × 328,209.80
  4. Step 4: Simplify right side
    439,746.80x = 216,493,813,917.96
  5. Step 5: Solve for x
    x = 216,493,813,917.96/439,746.80
  6. Step 6: Final answer
    x = 492,314.70

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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.