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Finding the Fourth Proportional to 525.38, 788.16 and 427.63

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Solution

The fourth proportional to 525.38, 788.16 and 427.63 is: 641.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.38 : 788.16 = 427.63 : x
  2. Step 2: Convert to fraction form
    525.38/788.16 = 427.63/x
  3. Step 3: Cross multiply
    525.38x = 788.16 × 427.63
  4. Step 4: Simplify right side
    525.38x = 337,041.97
  5. Step 5: Solve for x
    x = 337,041.97/525.38
  6. Step 6: Final answer
    x = 641.53

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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.