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Finding the Fourth Proportional to 1,368.55, 2,052.89 and 394.66

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Solution

The fourth proportional to 1,368.55, 2,052.89 and 394.66 is: 592.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.55 : 2,052.89 = 394.66 : x
  2. Step 2: Convert to fraction form
    1,368.55/2,052.89 = 394.66/x
  3. Step 3: Cross multiply
    1,368.55x = 2,052.89 × 394.66
  4. Step 4: Simplify right side
    1,368.55x = 810,193.57
  5. Step 5: Solve for x
    x = 810,193.57/1,368.55
  6. Step 6: Final answer
    x = 592.01

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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.