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Finding the Fourth Proportional to 1,328.21, 1,993.07 and 597.78

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Solution

The fourth proportional to 1,328.21, 1,993.07 and 597.78 is: 897.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.21 : 1,993.07 = 597.78 : x
  2. Step 2: Convert to fraction form
    1,328.21/1,993.07 = 597.78/x
  3. Step 3: Cross multiply
    1,328.21x = 1,993.07 × 597.78
  4. Step 4: Simplify right side
    1,328.21x = 1,191,414.40
  5. Step 5: Solve for x
    x = 1,191,414.40/1,328.21
  6. Step 6: Final answer
    x = 897.01

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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.