Home / 778,830.75-1,074,786.44-421,134.75

Finding the Fourth Proportional to 778,830.75, 1,074,786.44 and 421,134.75

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Solution

The fourth proportional to 778,830.75, 1,074,786.44 and 421,134.75 is: 581,165.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,830.75 : 1,074,786.44 = 421,134.75 : x
  2. Step 2: Convert to fraction form
    778,830.75/1,074,786.44 = 421,134.75/x
  3. Step 3: Cross multiply
    778,830.75x = 1,074,786.44 × 421,134.75
  4. Step 4: Simplify right side
    778,830.75x = 452,629,916,607.12
  5. Step 5: Solve for x
    x = 452,629,916,607.12/778,830.75
  6. Step 6: Final answer
    x = 581,165.96

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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.