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Finding the Fourth Proportional to 5,492.70, 8,239.05 and 1,388.70

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Solution

The fourth proportional to 5,492.70, 8,239.05 and 1,388.70 is: 2,083.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,492.70 : 8,239.05 = 1,388.70 : x
  2. Step 2: Convert to fraction form
    5,492.70/8,239.05 = 1,388.70/x
  3. Step 3: Cross multiply
    5,492.70x = 8,239.05 × 1,388.70
  4. Step 4: Simplify right side
    5,492.70x = 11,441,568.74
  5. Step 5: Solve for x
    x = 11,441,568.74/5,492.70
  6. Step 6: Final answer
    x = 2,083.05

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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.