Home / 728,879.32-1,005,630.16-422,849.44

Finding the Fourth Proportional to 728,879.32, 1,005,630.16 and 422,849.44

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Solution

The fourth proportional to 728,879.32, 1,005,630.16 and 422,849.44 is: 583,402.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,879.32 : 1,005,630.16 = 422,849.44 : x
  2. Step 2: Convert to fraction form
    728,879.32/1,005,630.16 = 422,849.44/x
  3. Step 3: Cross multiply
    728,879.32x = 1,005,630.16 × 422,849.44
  4. Step 4: Simplify right side
    728,879.32x = 425,230,150,003.11
  5. Step 5: Solve for x
    x = 425,230,150,003.11/728,879.32
  6. Step 6: Final answer
    x = 583,402.68

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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.