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Finding the Fourth Proportional to 388,322.33, 535,883.72 and 218,556.45

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Solution

The fourth proportional to 388,322.33, 535,883.72 and 218,556.45 is: 301,607.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,322.33 : 535,883.72 = 218,556.45 : x
  2. Step 2: Convert to fraction form
    388,322.33/535,883.72 = 218,556.45/x
  3. Step 3: Cross multiply
    388,322.33x = 535,883.72 × 218,556.45
  4. Step 4: Simplify right side
    388,322.33x = 117,120,842,363.21
  5. Step 5: Solve for x
    x = 117,120,842,363.21/388,322.33
  6. Step 6: Final answer
    x = 301,607.29

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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.