Home / 578,661.20-867,991.80-485,349.20

Finding the Fourth Proportional to 578,661.20, 867,991.80 and 485,349.20

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Solution

The fourth proportional to 578,661.20, 867,991.80 and 485,349.20 is: 728,023.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,661.20 : 867,991.80 = 485,349.20 : x
  2. Step 2: Convert to fraction form
    578,661.20/867,991.80 = 485,349.20/x
  3. Step 3: Cross multiply
    578,661.20x = 867,991.80 × 485,349.20
  4. Step 4: Simplify right side
    578,661.20x = 421,279,125,736.56
  5. Step 5: Solve for x
    x = 421,279,125,736.56/578,661.20
  6. Step 6: Final answer
    x = 728,023.80

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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.