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Finding the Fourth Proportional to 464.54, 696.88 and 418.64

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Solution

The fourth proportional to 464.54, 696.88 and 418.64 is: 628.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.54 : 696.88 = 418.64 : x
  2. Step 2: Convert to fraction form
    464.54/696.88 = 418.64/x
  3. Step 3: Cross multiply
    464.54x = 696.88 × 418.64
  4. Step 4: Simplify right side
    464.54x = 291,741.84
  5. Step 5: Solve for x
    x = 291,741.84/464.54
  6. Step 6: Final answer
    x = 628.02

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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.