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Finding the Fourth Proportional to 456.04, 683.93 and 126.90

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Solution

The fourth proportional to 456.04, 683.93 and 126.90 is: 190.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.04 : 683.93 = 126.90 : x
  2. Step 2: Convert to fraction form
    456.04/683.93 = 126.90/x
  3. Step 3: Cross multiply
    456.04x = 683.93 × 126.90
  4. Step 4: Simplify right side
    456.04x = 86,790.72
  5. Step 5: Solve for x
    x = 86,790.72/456.04
  6. Step 6: Final answer
    x = 190.31

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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.