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Finding the Fourth Proportional to 486.69, 730.08 and 140.03

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Solution

The fourth proportional to 486.69, 730.08 and 140.03 is: 210.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.69 : 730.08 = 140.03 : x
  2. Step 2: Convert to fraction form
    486.69/730.08 = 140.03/x
  3. Step 3: Cross multiply
    486.69x = 730.08 × 140.03
  4. Step 4: Simplify right side
    486.69x = 102,228.93
  5. Step 5: Solve for x
    x = 102,228.93/486.69
  6. Step 6: Final answer
    x = 210.05

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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.