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Finding the Fourth Proportional to 372.40, 517.48 and 368.64

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Solution

The fourth proportional to 372.40, 517.48 and 368.64 is: 512.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.40 : 517.48 = 368.64 : x
  2. Step 2: Convert to fraction form
    372.40/517.48 = 368.64/x
  3. Step 3: Cross multiply
    372.40x = 517.48 × 368.64
  4. Step 4: Simplify right side
    372.40x = 190,763.83
  5. Step 5: Solve for x
    x = 190,763.83/372.40
  6. Step 6: Final answer
    x = 512.26

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.