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Finding the Fourth Proportional to 611.16, 915.93 and 351.33

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Solution

The fourth proportional to 611.16, 915.93 and 351.33 is: 526.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.16 : 915.93 = 351.33 : x
  2. Step 2: Convert to fraction form
    611.16/915.93 = 351.33/x
  3. Step 3: Cross multiply
    611.16x = 915.93 × 351.33
  4. Step 4: Simplify right side
    611.16x = 321,793.69
  5. Step 5: Solve for x
    x = 321,793.69/611.16
  6. Step 6: Final answer
    x = 526.53

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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.