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Finding the Fourth Proportional to 620.85, 931.28 and 188.02

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Solution

The fourth proportional to 620.85, 931.28 and 188.02 is: 282.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.85 : 931.28 = 188.02 : x
  2. Step 2: Convert to fraction form
    620.85/931.28 = 188.02/x
  3. Step 3: Cross multiply
    620.85x = 931.28 × 188.02
  4. Step 4: Simplify right side
    620.85x = 175,098.33
  5. Step 5: Solve for x
    x = 175,098.33/620.85
  6. Step 6: Final answer
    x = 282.03

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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.