Home / 778,832.75-1,074,789.20-421,136.75

Finding the Fourth Proportional to 778,832.75, 1,074,789.20 and 421,136.75

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Solution

The fourth proportional to 778,832.75, 1,074,789.20 and 421,136.75 is: 581,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,832.75 : 1,074,789.20 = 421,136.75 : x
  2. Step 2: Convert to fraction form
    778,832.75/1,074,789.20 = 421,136.75/x
  3. Step 3: Cross multiply
    778,832.75x = 1,074,789.20 × 421,136.75
  4. Step 4: Simplify right side
    778,832.75x = 452,633,230,623.10
  5. Step 5: Solve for x
    x = 452,633,230,623.10/778,832.75
  6. Step 6: Final answer
    x = 581,168.72

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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.