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Finding the Fourth Proportional to 1,674.95, 2,311.43 and 928.88

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Solution

The fourth proportional to 1,674.95, 2,311.43 and 928.88 is: 1,281.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,674.95 : 2,311.43 = 928.88 : x
  2. Step 2: Convert to fraction form
    1,674.95/2,311.43 = 928.88/x
  3. Step 3: Cross multiply
    1,674.95x = 2,311.43 × 928.88
  4. Step 4: Simplify right side
    1,674.95x = 2,147,033.56
  5. Step 5: Solve for x
    x = 2,147,033.56/1,674.95
  6. Step 6: Final answer
    x = 1,281.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.