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Finding the Fourth Proportional to 528,105.98, 728,786.44 and 286,388.48

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Solution

The fourth proportional to 528,105.98, 728,786.44 and 286,388.48 is: 395,216.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,105.98 : 728,786.44 = 286,388.48 : x
  2. Step 2: Convert to fraction form
    528,105.98/728,786.44 = 286,388.48/x
  3. Step 3: Cross multiply
    528,105.98x = 728,786.44 × 286,388.48
  4. Step 4: Simplify right side
    528,105.98x = 208,716,040,796.21
  5. Step 5: Solve for x
    x = 208,716,040,796.21/528,105.98
  6. Step 6: Final answer
    x = 395,216.20

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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.