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Finding the Fourth Proportional to 368.72, 552.12 and 253.52

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Solution

The fourth proportional to 368.72, 552.12 and 253.52 is: 379.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.72 : 552.12 = 253.52 : x
  2. Step 2: Convert to fraction form
    368.72/552.12 = 253.52/x
  3. Step 3: Cross multiply
    368.72x = 552.12 × 253.52
  4. Step 4: Simplify right side
    368.72x = 139,973.46
  5. Step 5: Solve for x
    x = 139,973.46/368.72
  6. Step 6: Final answer
    x = 379.62

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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.