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Finding the Fourth Proportional to 694.00, 1,038.93 and 419.26

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Solution

The fourth proportional to 694.00, 1,038.93 and 419.26 is: 627.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.00 : 1,038.93 = 419.26 : x
  2. Step 2: Convert to fraction form
    694.00/1,038.93 = 419.26/x
  3. Step 3: Cross multiply
    694.00x = 1,038.93 × 419.26
  4. Step 4: Simplify right side
    694.00x = 435,579.57
  5. Step 5: Solve for x
    x = 435,579.57/694.00
  6. Step 6: Final answer
    x = 627.64

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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.