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Finding the Fourth Proportional to 434.15, 651.16 and 109.51

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Solution

The fourth proportional to 434.15, 651.16 and 109.51 is: 164.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.15 : 651.16 = 109.51 : x
  2. Step 2: Convert to fraction form
    434.15/651.16 = 109.51/x
  3. Step 3: Cross multiply
    434.15x = 651.16 × 109.51
  4. Step 4: Simplify right side
    434.15x = 71,308.53
  5. Step 5: Solve for x
    x = 71,308.53/434.15
  6. Step 6: Final answer
    x = 164.25

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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.