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Finding the Fourth Proportional to 434.51, 651.40 and 190.85

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Solution

The fourth proportional to 434.51, 651.40 and 190.85 is: 286.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.51 : 651.40 = 190.85 : x
  2. Step 2: Convert to fraction form
    434.51/651.40 = 190.85/x
  3. Step 3: Cross multiply
    434.51x = 651.40 × 190.85
  4. Step 4: Simplify right side
    434.51x = 124,319.69
  5. Step 5: Solve for x
    x = 124,319.69/434.51
  6. Step 6: Final answer
    x = 286.11

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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.