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Finding the Fourth Proportional to 495.21, 743.13 and 290.19

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Solution

The fourth proportional to 495.21, 743.13 and 290.19 is: 435.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.21 : 743.13 = 290.19 : x
  2. Step 2: Convert to fraction form
    495.21/743.13 = 290.19/x
  3. Step 3: Cross multiply
    495.21x = 743.13 × 290.19
  4. Step 4: Simplify right side
    495.21x = 215,648.89
  5. Step 5: Solve for x
    x = 215,648.89/495.21
  6. Step 6: Final answer
    x = 435.47

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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.