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Finding the Fourth Proportional to 525.10, 787.64 and 216.87

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Solution

The fourth proportional to 525.10, 787.64 and 216.87 is: 325.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.10 : 787.64 = 216.87 : x
  2. Step 2: Convert to fraction form
    525.10/787.64 = 216.87/x
  3. Step 3: Cross multiply
    525.10x = 787.64 × 216.87
  4. Step 4: Simplify right side
    525.10x = 170,811.55
  5. Step 5: Solve for x
    x = 170,811.55/525.10
  6. Step 6: Final answer
    x = 325.30

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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.