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Finding the Fourth Proportional to 525.39, 787 and 308.85

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Solution

The fourth proportional to 525.39, 787 and 308.85 is: 462.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.39 : 787 = 308.85 : x
  2. Step 2: Convert to fraction form
    525.39/787 = 308.85/x
  3. Step 3: Cross multiply
    525.39x = 787 × 308.85
  4. Step 4: Simplify right side
    525.39x = 243,064.95
  5. Step 5: Solve for x
    x = 243,064.95/525.39
  6. Step 6: Final answer
    x = 462.64

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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.