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Finding the Fourth Proportional to 956.21, 1,319.19 and 552.22

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Solution

The fourth proportional to 956.21, 1,319.19 and 552.22 is: 761.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.21 : 1,319.19 = 552.22 : x
  2. Step 2: Convert to fraction form
    956.21/1,319.19 = 552.22/x
  3. Step 3: Cross multiply
    956.21x = 1,319.19 × 552.22
  4. Step 4: Simplify right side
    956.21x = 728,477.73
  5. Step 5: Solve for x
    x = 728,477.73/956.21
  6. Step 6: Final answer
    x = 761.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.