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Finding the Fourth Proportional to 434.19, 651.29 and 109.55

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Solution

The fourth proportional to 434.19, 651.29 and 109.55 is: 164.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.19 : 651.29 = 109.55 : x
  2. Step 2: Convert to fraction form
    434.19/651.29 = 109.55/x
  3. Step 3: Cross multiply
    434.19x = 651.29 × 109.55
  4. Step 4: Simplify right side
    434.19x = 71,345.02
  5. Step 5: Solve for x
    x = 71,345.02/434.19
  6. Step 6: Final answer
    x = 164.32

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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.