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Finding the Fourth Proportional to 620.13, 930.18 and 286.54

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Solution

The fourth proportional to 620.13, 930.18 and 286.54 is: 429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.13 : 930.18 = 286.54 : x
  2. Step 2: Convert to fraction form
    620.13/930.18 = 286.54/x
  3. Step 3: Cross multiply
    620.13x = 930.18 × 286.54
  4. Step 4: Simplify right side
    620.13x = 266,532.53
  5. Step 5: Solve for x
    x = 266,532.53/620.13
  6. Step 6: Final answer
    x = 429.80

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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.