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Finding the Fourth Proportional to 471.87, 651.49 and 303.90

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Solution

The fourth proportional to 471.87, 651.49 and 303.90 is: 419.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.87 : 651.49 = 303.90 : x
  2. Step 2: Convert to fraction form
    471.87/651.49 = 303.90/x
  3. Step 3: Cross multiply
    471.87x = 651.49 × 303.90
  4. Step 4: Simplify right side
    471.87x = 197,987.81
  5. Step 5: Solve for x
    x = 197,987.81/471.87
  6. Step 6: Final answer
    x = 419.58

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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.