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Finding the Fourth Proportional to 679.63, 1,017.83 and 371.02

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Solution

The fourth proportional to 679.63, 1,017.83 and 371.02 is: 555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.63 : 1,017.83 = 371.02 : x
  2. Step 2: Convert to fraction form
    679.63/1,017.83 = 371.02/x
  3. Step 3: Cross multiply
    679.63x = 1,017.83 × 371.02
  4. Step 4: Simplify right side
    679.63x = 377,633.43
  5. Step 5: Solve for x
    x = 377,633.43/679.63
  6. Step 6: Final answer
    x = 555.65

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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.