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Finding the Fourth Proportional to 1,486.16, 2,228.48 and 620.24

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Solution

The fourth proportional to 1,486.16, 2,228.48 and 620.24 is: 930.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.16 : 2,228.48 = 620.24 : x
  2. Step 2: Convert to fraction form
    1,486.16/2,228.48 = 620.24/x
  3. Step 3: Cross multiply
    1,486.16x = 2,228.48 × 620.24
  4. Step 4: Simplify right side
    1,486.16x = 1,382,192.44
  5. Step 5: Solve for x
    x = 1,382,192.44/1,486.16
  6. Step 6: Final answer
    x = 930.04

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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.