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Finding the Fourth Proportional to 2,079.73, 3,120 and 619.03

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Solution

The fourth proportional to 2,079.73, 3,120 and 619.03 is: 928.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.73 : 3,120 = 619.03 : x
  2. Step 2: Convert to fraction form
    2,079.73/3,120 = 619.03/x
  3. Step 3: Cross multiply
    2,079.73x = 3,120 × 619.03
  4. Step 4: Simplify right side
    2,079.73x = 1,931,373.60
  5. Step 5: Solve for x
    x = 1,931,373.60/2,079.73
  6. Step 6: Final answer
    x = 928.67

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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.