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Finding the Fourth Proportional to 387,703.20, 580,863.60 and 317,200.80

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Solution

The fourth proportional to 387,703.20, 580,863.60 and 317,200.80 is: 475,235.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,703.20 : 580,863.60 = 317,200.80 : x
  2. Step 2: Convert to fraction form
    387,703.20/580,863.60 = 317,200.80/x
  3. Step 3: Cross multiply
    387,703.20x = 580,863.60 × 317,200.80
  4. Step 4: Simplify right side
    387,703.20x = 184,250,398,610.88
  5. Step 5: Solve for x
    x = 184,250,398,610.88/387,703.20
  6. Step 6: Final answer
    x = 475,235.69

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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.