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Finding the Fourth Proportional to 296.63, 409.31 and 172.19

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Solution

The fourth proportional to 296.63, 409.31 and 172.19 is: 237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.63 : 409.31 = 172.19 : x
  2. Step 2: Convert to fraction form
    296.63/409.31 = 172.19/x
  3. Step 3: Cross multiply
    296.63x = 409.31 × 172.19
  4. Step 4: Simplify right side
    296.63x = 70,478.23
  5. Step 5: Solve for x
    x = 70,478.23/296.63
  6. Step 6: Final answer
    x = 237.60

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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.