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Finding the Fourth Proportional to 485.82, 729.25 and 291.22

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Solution

The fourth proportional to 485.82, 729.25 and 291.22 is: 437.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.82 : 729.25 = 291.22 : x
  2. Step 2: Convert to fraction form
    485.82/729.25 = 291.22/x
  3. Step 3: Cross multiply
    485.82x = 729.25 × 291.22
  4. Step 4: Simplify right side
    485.82x = 212,369.63
  5. Step 5: Solve for x
    x = 212,369.63/485.82
  6. Step 6: Final answer
    x = 437.14

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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.