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Finding the Fourth Proportional to 434.40, 651.28 and 190.84

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Solution

The fourth proportional to 434.40, 651.28 and 190.84 is: 286.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.40 : 651.28 = 190.84 : x
  2. Step 2: Convert to fraction form
    434.40/651.28 = 190.84/x
  3. Step 3: Cross multiply
    434.40x = 651.28 × 190.84
  4. Step 4: Simplify right side
    434.40x = 124,290.28
  5. Step 5: Solve for x
    x = 124,290.28/434.40
  6. Step 6: Final answer
    x = 286.12

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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.