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Finding the Fourth Proportional to 525.51, 787.64 and 371.21

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Solution

The fourth proportional to 525.51, 787.64 and 371.21 is: 556.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.51 : 787.64 = 371.21 : x
  2. Step 2: Convert to fraction form
    525.51/787.64 = 371.21/x
  3. Step 3: Cross multiply
    525.51x = 787.64 × 371.21
  4. Step 4: Simplify right side
    525.51x = 292,374.05
  5. Step 5: Solve for x
    x = 292,374.05/525.51
  6. Step 6: Final answer
    x = 556.36

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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.