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Finding the Fourth Proportional to 501.27, 751.86 and 172.18

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Solution

The fourth proportional to 501.27, 751.86 and 172.18 is: 258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.27 : 751.86 = 172.18 : x
  2. Step 2: Convert to fraction form
    501.27/751.86 = 172.18/x
  3. Step 3: Cross multiply
    501.27x = 751.86 × 172.18
  4. Step 4: Simplify right side
    501.27x = 129,455.25
  5. Step 5: Solve for x
    x = 129,455.25/501.27
  6. Step 6: Final answer
    x = 258.25

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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.