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Finding the Fourth Proportional to 2,387.40, 3,581.33 and 926.67

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Solution

The fourth proportional to 2,387.40, 3,581.33 and 926.67 is: 1,390.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.40 : 3,581.33 = 926.67 : x
  2. Step 2: Convert to fraction form
    2,387.40/3,581.33 = 926.67/x
  3. Step 3: Cross multiply
    2,387.40x = 3,581.33 × 926.67
  4. Step 4: Simplify right side
    2,387.40x = 3,318,690.95
  5. Step 5: Solve for x
    x = 3,318,690.95/2,387.40
  6. Step 6: Final answer
    x = 1,390.09

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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.