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Finding the Fourth Proportional to 5,393.28, 8,089.86 and 1,390.65

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Solution

The fourth proportional to 5,393.28, 8,089.86 and 1,390.65 is: 2,085.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,393.28 : 8,089.86 = 1,390.65 : x
  2. Step 2: Convert to fraction form
    5,393.28/8,089.86 = 1,390.65/x
  3. Step 3: Cross multiply
    5,393.28x = 8,089.86 × 1,390.65
  4. Step 4: Simplify right side
    5,393.28x = 11,250,163.81
  5. Step 5: Solve for x
    x = 11,250,163.81/5,393.28
  6. Step 6: Final answer
    x = 2,085.96

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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.