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Finding the Fourth Proportional to 415,556.80, 623,104.80 and 178,859.20

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Solution

The fourth proportional to 415,556.80, 623,104.80 and 178,859.20 is: 268,189.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,556.80 : 623,104.80 = 178,859.20 : x
  2. Step 2: Convert to fraction form
    415,556.80/623,104.80 = 178,859.20/x
  3. Step 3: Cross multiply
    415,556.80x = 623,104.80 × 178,859.20
  4. Step 4: Simplify right side
    415,556.80x = 111,448,026,044.16
  5. Step 5: Solve for x
    x = 111,448,026,044.16/415,556.80
  6. Step 6: Final answer
    x = 268,189.63

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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.