Home / 478,213.60-659,936.69-287,230.18

Finding the Fourth Proportional to 478,213.60, 659,936.69 and 287,230.18

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Solution

The fourth proportional to 478,213.60, 659,936.69 and 287,230.18 is: 396,378.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,213.60 : 659,936.69 = 287,230.18 : x
  2. Step 2: Convert to fraction form
    478,213.60/659,936.69 = 287,230.18/x
  3. Step 3: Cross multiply
    478,213.60x = 659,936.69 × 287,230.18
  4. Step 4: Simplify right side
    478,213.60x = 189,553,734,257.30
  5. Step 5: Solve for x
    x = 189,553,734,257.30/478,213.60
  6. Step 6: Final answer
    x = 396,378.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.