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Finding the Fourth Proportional to 5,291.87, 7,936.80 and 2,658.67

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Solution

The fourth proportional to 5,291.87, 7,936.80 and 2,658.67 is: 3,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,291.87 : 7,936.80 = 2,658.67 : x
  2. Step 2: Convert to fraction form
    5,291.87/7,936.80 = 2,658.67/x
  3. Step 3: Cross multiply
    5,291.87x = 7,936.80 × 2,658.67
  4. Step 4: Simplify right side
    5,291.87x = 21,101,332.06
  5. Step 5: Solve for x
    x = 21,101,332.06/5,291.87
  6. Step 6: Final answer
    x = 3,987.50

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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.