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Finding the Fourth Proportional to 525.21, 787.83 and 140.46

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Solution

The fourth proportional to 525.21, 787.83 and 140.46 is: 210.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.21 : 787.83 = 140.46 : x
  2. Step 2: Convert to fraction form
    525.21/787.83 = 140.46/x
  3. Step 3: Cross multiply
    525.21x = 787.83 × 140.46
  4. Step 4: Simplify right side
    525.21x = 110,658.60
  5. Step 5: Solve for x
    x = 110,658.60/525.21
  6. Step 6: Final answer
    x = 210.69

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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.