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Finding the Fourth Proportional to 1,322.58, 1,984.14 and 398.14

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Solution

The fourth proportional to 1,322.58, 1,984.14 and 398.14 is: 597.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.58 : 1,984.14 = 398.14 : x
  2. Step 2: Convert to fraction form
    1,322.58/1,984.14 = 398.14/x
  3. Step 3: Cross multiply
    1,322.58x = 1,984.14 × 398.14
  4. Step 4: Simplify right side
    1,322.58x = 789,965.50
  5. Step 5: Solve for x
    x = 789,965.50/1,322.58
  6. Step 6: Final answer
    x = 597.29

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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.