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Finding the Fourth Proportional to 490.34, 735.61 and 143.70

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Solution

The fourth proportional to 490.34, 735.61 and 143.70 is: 215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.34 : 735.61 = 143.70 : x
  2. Step 2: Convert to fraction form
    490.34/735.61 = 143.70/x
  3. Step 3: Cross multiply
    490.34x = 735.61 × 143.70
  4. Step 4: Simplify right side
    490.34x = 105,707.16
  5. Step 5: Solve for x
    x = 105,707.16/490.34
  6. Step 6: Final answer
    x = 215.58

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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.