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Finding the Fourth Proportional to 557.26, 835.90 and 172.50

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Solution

The fourth proportional to 557.26, 835.90 and 172.50 is: 258.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.26 : 835.90 = 172.50 : x
  2. Step 2: Convert to fraction form
    557.26/835.90 = 172.50/x
  3. Step 3: Cross multiply
    557.26x = 835.90 × 172.50
  4. Step 4: Simplify right side
    557.26x = 144,192.75
  5. Step 5: Solve for x
    x = 144,192.75/557.26
  6. Step 6: Final answer
    x = 258.75

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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.