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Finding the Fourth Proportional to 476.69, 657.71 and 290.27

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Solution

The fourth proportional to 476.69, 657.71 and 290.27 is: 400.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.69 : 657.71 = 290.27 : x
  2. Step 2: Convert to fraction form
    476.69/657.71 = 290.27/x
  3. Step 3: Cross multiply
    476.69x = 657.71 × 290.27
  4. Step 4: Simplify right side
    476.69x = 190,908.74
  5. Step 5: Solve for x
    x = 190,908.74/476.69
  6. Step 6: Final answer
    x = 400.49

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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.