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Finding the Fourth Proportional to 351.16, 526.98 and 145.72

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Solution

The fourth proportional to 351.16, 526.98 and 145.72 is: 218.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.16 : 526.98 = 145.72 : x
  2. Step 2: Convert to fraction form
    351.16/526.98 = 145.72/x
  3. Step 3: Cross multiply
    351.16x = 526.98 × 145.72
  4. Step 4: Simplify right side
    351.16x = 76,791.53
  5. Step 5: Solve for x
    x = 76,791.53/351.16
  6. Step 6: Final answer
    x = 218.68

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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.