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Finding the Fourth Proportional to 662.51, 991.87 and 525.75

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Solution

The fourth proportional to 662.51, 991.87 and 525.75 is: 787.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.51 : 991.87 = 525.75 : x
  2. Step 2: Convert to fraction form
    662.51/991.87 = 525.75/x
  3. Step 3: Cross multiply
    662.51x = 991.87 × 525.75
  4. Step 4: Simplify right side
    662.51x = 521,474.34
  5. Step 5: Solve for x
    x = 521,474.34/662.51
  6. Step 6: Final answer
    x = 787.13

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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.