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Finding the Fourth Proportional to 525.11, 786.75 and 339.80

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Solution

The fourth proportional to 525.11, 786.75 and 339.80 is: 509.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.11 : 786.75 = 339.80 : x
  2. Step 2: Convert to fraction form
    525.11/786.75 = 339.80/x
  3. Step 3: Cross multiply
    525.11x = 786.75 × 339.80
  4. Step 4: Simplify right side
    525.11x = 267,333.72
  5. Step 5: Solve for x
    x = 267,333.72/525.11
  6. Step 6: Final answer
    x = 509.11

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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.