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Finding the Fourth Proportional to 471.50, 650.70 and 285.05

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Solution

The fourth proportional to 471.50, 650.70 and 285.05 is: 393.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.50 : 650.70 = 285.05 : x
  2. Step 2: Convert to fraction form
    471.50/650.70 = 285.05/x
  3. Step 3: Cross multiply
    471.50x = 650.70 × 285.05
  4. Step 4: Simplify right side
    471.50x = 185,478.78
  5. Step 5: Solve for x
    x = 185,478.78/471.50
  6. Step 6: Final answer
    x = 393.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.