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Finding the Fourth Proportional to 1,293.78, 1,940.58 and 416.28

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Solution

The fourth proportional to 1,293.78, 1,940.58 and 416.28 is: 624.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.78 : 1,940.58 = 416.28 : x
  2. Step 2: Convert to fraction form
    1,293.78/1,940.58 = 416.28/x
  3. Step 3: Cross multiply
    1,293.78x = 1,940.58 × 416.28
  4. Step 4: Simplify right side
    1,293.78x = 807,824.64
  5. Step 5: Solve for x
    x = 807,824.64/1,293.78
  6. Step 6: Final answer
    x = 624.39

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1.5x scale

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.