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Finding the Fourth Proportional to 1,483.80, 2,225.74 and 388.28

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Solution

The fourth proportional to 1,483.80, 2,225.74 and 388.28 is: 582.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,483.80 : 2,225.74 = 388.28 : x
  2. Step 2: Convert to fraction form
    1,483.80/2,225.74 = 388.28/x
  3. Step 3: Cross multiply
    1,483.80x = 2,225.74 × 388.28
  4. Step 4: Simplify right side
    1,483.80x = 864,210.33
  5. Step 5: Solve for x
    x = 864,210.33/1,483.80
  6. Step 6: Final answer
    x = 582.43

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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.