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Finding the Fourth Proportional to 296.84, 409.77 and 172.45

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Solution

The fourth proportional to 296.84, 409.77 and 172.45 is: 238.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.84 : 409.77 = 172.45 : x
  2. Step 2: Convert to fraction form
    296.84/409.77 = 172.45/x
  3. Step 3: Cross multiply
    296.84x = 409.77 × 172.45
  4. Step 4: Simplify right side
    296.84x = 70,665.35
  5. Step 5: Solve for x
    x = 70,665.35/296.84
  6. Step 6: Final answer
    x = 238.06

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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.