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Finding the Fourth Proportional to 387,971.01, 535,399.88 and 218,205

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Solution

The fourth proportional to 387,971.01, 535,399.88 and 218,205 is: 301,122.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,971.01 : 535,399.88 = 218,205 : x
  2. Step 2: Convert to fraction form
    387,971.01/535,399.88 = 218,205/x
  3. Step 3: Cross multiply
    387,971.01x = 535,399.88 × 218,205
  4. Step 4: Simplify right side
    387,971.01x = 116,826,929,724.38
  5. Step 5: Solve for x
    x = 116,826,929,724.38/387,971.01
  6. Step 6: Final answer
    x = 301,122.83

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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.