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Finding the Fourth Proportional to 320.07, 480.13 and 137.42

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Solution

The fourth proportional to 320.07, 480.13 and 137.42 is: 206.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.07 : 480.13 = 137.42 : x
  2. Step 2: Convert to fraction form
    320.07/480.13 = 137.42/x
  3. Step 3: Cross multiply
    320.07x = 480.13 × 137.42
  4. Step 4: Simplify right side
    320.07x = 65,980.19
  5. Step 5: Solve for x
    x = 65,980.19/320.07
  6. Step 6: Final answer
    x = 206.14

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.