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Finding the Fourth Proportional to 368.48, 552.27 and 287.21

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Solution

The fourth proportional to 368.48, 552.27 and 287.21 is: 430.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.48 : 552.27 = 287.21 : x
  2. Step 2: Convert to fraction form
    368.48/552.27 = 287.21/x
  3. Step 3: Cross multiply
    368.48x = 552.27 × 287.21
  4. Step 4: Simplify right side
    368.48x = 158,617.47
  5. Step 5: Solve for x
    x = 158,617.47/368.48
  6. Step 6: Final answer
    x = 430.46

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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.