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Finding the Fourth Proportional to 524.30, 786.48 and 199.70

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Solution

The fourth proportional to 524.30, 786.48 and 199.70 is: 299.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.30 : 786.48 = 199.70 : x
  2. Step 2: Convert to fraction form
    524.30/786.48 = 199.70/x
  3. Step 3: Cross multiply
    524.30x = 786.48 × 199.70
  4. Step 4: Simplify right side
    524.30x = 157,056.12
  5. Step 5: Solve for x
    x = 157,056.12/524.30
  6. Step 6: Final answer
    x = 299.55

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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.