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Finding the Fourth Proportional to 478.22, 716.93 and 455.54

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Solution

The fourth proportional to 478.22, 716.93 and 455.54 is: 682.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.22 : 716.93 = 455.54 : x
  2. Step 2: Convert to fraction form
    478.22/716.93 = 455.54/x
  3. Step 3: Cross multiply
    478.22x = 716.93 × 455.54
  4. Step 4: Simplify right side
    478.22x = 326,588.01
  5. Step 5: Solve for x
    x = 326,588.01/478.22
  6. Step 6: Final answer
    x = 682.92

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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.