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Finding the Fourth Proportional to 485.96, 730.31 and 290.99

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Solution

The fourth proportional to 485.96, 730.31 and 290.99 is: 437.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.96 : 730.31 = 290.99 : x
  2. Step 2: Convert to fraction form
    485.96/730.31 = 290.99/x
  3. Step 3: Cross multiply
    485.96x = 730.31 × 290.99
  4. Step 4: Simplify right side
    485.96x = 212,507.80
  5. Step 5: Solve for x
    x = 212,507.80/485.96
  6. Step 6: Final answer
    x = 437.30

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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.