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Finding the Fourth Proportional to 291.03, 401.54 and 172.98

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Solution

The fourth proportional to 291.03, 401.54 and 172.98 is: 238.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.03 : 401.54 = 172.98 : x
  2. Step 2: Convert to fraction form
    291.03/401.54 = 172.98/x
  3. Step 3: Cross multiply
    291.03x = 401.54 × 172.98
  4. Step 4: Simplify right side
    291.03x = 69,457.52
  5. Step 5: Solve for x
    x = 69,457.52/291.03
  6. Step 6: Final answer
    x = 238.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.