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Finding the Fourth Proportional to 301.56, 451.74 and 139.02

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Solution

The fourth proportional to 301.56, 451.74 and 139.02 is: 208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.56 : 451.74 = 139.02 : x
  2. Step 2: Convert to fraction form
    301.56/451.74 = 139.02/x
  3. Step 3: Cross multiply
    301.56x = 451.74 × 139.02
  4. Step 4: Simplify right side
    301.56x = 62,800.89
  5. Step 5: Solve for x
    x = 62,800.89/301.56
  6. Step 6: Final answer
    x = 208.25

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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.