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Finding the Fourth Proportional to 476.22, 657.06 and 289.62

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Solution

The fourth proportional to 476.22, 657.06 and 289.62 is: 399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.22 : 657.06 = 289.62 : x
  2. Step 2: Convert to fraction form
    476.22/657.06 = 289.62/x
  3. Step 3: Cross multiply
    476.22x = 657.06 × 289.62
  4. Step 4: Simplify right side
    476.22x = 190,297.72
  5. Step 5: Solve for x
    x = 190,297.72/476.22
  6. Step 6: Final answer
    x = 399.60

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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.