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Finding the Fourth Proportional to 556.90, 835.32 and 172.16

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Solution

The fourth proportional to 556.90, 835.32 and 172.16 is: 258.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.90 : 835.32 = 172.16 : x
  2. Step 2: Convert to fraction form
    556.90/835.32 = 172.16/x
  3. Step 3: Cross multiply
    556.90x = 835.32 × 172.16
  4. Step 4: Simplify right side
    556.90x = 143,808.69
  5. Step 5: Solve for x
    x = 143,808.69/556.90
  6. Step 6: Final answer
    x = 258.23

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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.