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Finding the Fourth Proportional to 636.77, 955.38 and 290.07

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Solution

The fourth proportional to 636.77, 955.38 and 290.07 is: 435.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.77 : 955.38 = 290.07 : x
  2. Step 2: Convert to fraction form
    636.77/955.38 = 290.07/x
  3. Step 3: Cross multiply
    636.77x = 955.38 × 290.07
  4. Step 4: Simplify right side
    636.77x = 277,127.08
  5. Step 5: Solve for x
    x = 277,127.08/636.77
  6. Step 6: Final answer
    x = 435.21

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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.