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Finding the Fourth Proportional to 501.61, 751.88 and 172.45

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Solution

The fourth proportional to 501.61, 751.88 and 172.45 is: 258.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.61 : 751.88 = 172.45 : x
  2. Step 2: Convert to fraction form
    501.61/751.88 = 172.45/x
  3. Step 3: Cross multiply
    501.61x = 751.88 × 172.45
  4. Step 4: Simplify right side
    501.61x = 129,657.95
  5. Step 5: Solve for x
    x = 129,657.95/501.61
  6. Step 6: Final answer
    x = 258.49

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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.