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Finding the Fourth Proportional to 272.17, 407.18 and 190.46

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Solution

The fourth proportional to 272.17, 407.18 and 190.46 is: 284.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.17 : 407.18 = 190.46 : x
  2. Step 2: Convert to fraction form
    272.17/407.18 = 190.46/x
  3. Step 3: Cross multiply
    272.17x = 407.18 × 190.46
  4. Step 4: Simplify right side
    272.17x = 77,548.51
  5. Step 5: Solve for x
    x = 77,548.51/272.17
  6. Step 6: Final answer
    x = 284.93

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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.