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Finding the Fourth Proportional to 351.15, 526.71 and 107.69

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Solution

The fourth proportional to 351.15, 526.71 and 107.69 is: 161.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.15 : 526.71 = 107.69 : x
  2. Step 2: Convert to fraction form
    351.15/526.71 = 107.69/x
  3. Step 3: Cross multiply
    351.15x = 526.71 × 107.69
  4. Step 4: Simplify right side
    351.15x = 56,718.77
  5. Step 5: Solve for x
    x = 56,718.77/351.15
  6. Step 6: Final answer
    x = 161.52

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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.