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Finding the Fourth Proportional to 5,679.39, 7,835.76 and 3,320.67

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Solution

The fourth proportional to 5,679.39, 7,835.76 and 3,320.67 is: 4,581.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.39 : 7,835.76 = 3,320.67 : x
  2. Step 2: Convert to fraction form
    5,679.39/7,835.76 = 3,320.67/x
  3. Step 3: Cross multiply
    5,679.39x = 7,835.76 × 3,320.67
  4. Step 4: Simplify right side
    5,679.39x = 26,019,973.16
  5. Step 5: Solve for x
    x = 26,019,973.16/5,679.39
  6. Step 6: Final answer
    x = 4,581.47

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1.5x scale

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.