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Finding the Fourth Proportional to 501.22, 751.64 and 172.09

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Solution

The fourth proportional to 501.22, 751.64 and 172.09 is: 258.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.22 : 751.64 = 172.09 : x
  2. Step 2: Convert to fraction form
    501.22/751.64 = 172.09/x
  3. Step 3: Cross multiply
    501.22x = 751.64 × 172.09
  4. Step 4: Simplify right side
    501.22x = 129,347.96
  5. Step 5: Solve for x
    x = 129,347.96/501.22
  6. Step 6: Final answer
    x = 258.07

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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.