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Finding the Fourth Proportional to 571.21, 787.86 and 552.15

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Solution

The fourth proportional to 571.21, 787.86 and 552.15 is: 761.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.21 : 787.86 = 552.15 : x
  2. Step 2: Convert to fraction form
    571.21/787.86 = 552.15/x
  3. Step 3: Cross multiply
    571.21x = 787.86 × 552.15
  4. Step 4: Simplify right side
    571.21x = 435,016.90
  5. Step 5: Solve for x
    x = 435,016.90/571.21
  6. Step 6: Final answer
    x = 761.57

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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.