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Finding the Fourth Proportional to 471.94, 651.46 and 320.56

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Solution

The fourth proportional to 471.94, 651.46 and 320.56 is: 442.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.94 : 651.46 = 320.56 : x
  2. Step 2: Convert to fraction form
    471.94/651.46 = 320.56/x
  3. Step 3: Cross multiply
    471.94x = 651.46 × 320.56
  4. Step 4: Simplify right side
    471.94x = 208,832.02
  5. Step 5: Solve for x
    x = 208,832.02/471.94
  6. Step 6: Final answer
    x = 442.50

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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.