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Finding the Fourth Proportional to 858.03, 1,286.69 and 370.74

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Solution

The fourth proportional to 858.03, 1,286.69 and 370.74 is: 555.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.03 : 1,286.69 = 370.74 : x
  2. Step 2: Convert to fraction form
    858.03/1,286.69 = 370.74/x
  3. Step 3: Cross multiply
    858.03x = 1,286.69 × 370.74
  4. Step 4: Simplify right side
    858.03x = 477,022.16
  5. Step 5: Solve for x
    x = 477,022.16/858.03
  6. Step 6: Final answer
    x = 555.95

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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.