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Finding the Fourth Proportional to 611.68, 915.44 and 368.37

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Solution

The fourth proportional to 611.68, 915.44 and 368.37 is: 551.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.68 : 915.44 = 368.37 : x
  2. Step 2: Convert to fraction form
    611.68/915.44 = 368.37/x
  3. Step 3: Cross multiply
    611.68x = 915.44 × 368.37
  4. Step 4: Simplify right side
    611.68x = 337,223.61
  5. Step 5: Solve for x
    x = 337,223.61/611.68
  6. Step 6: Final answer
    x = 551.31

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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.