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Finding the Fourth Proportional to 314.84, 434.34 and 190.28

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Solution

The fourth proportional to 314.84, 434.34 and 190.28 is: 262.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.84 : 434.34 = 190.28 : x
  2. Step 2: Convert to fraction form
    314.84/434.34 = 190.28/x
  3. Step 3: Cross multiply
    314.84x = 434.34 × 190.28
  4. Step 4: Simplify right side
    314.84x = 82,646.22
  5. Step 5: Solve for x
    x = 82,646.22/314.84
  6. Step 6: Final answer
    x = 262.50

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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.