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Finding the Fourth Proportional to 5,388.40, 8,083.04 and 1,492.80

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Solution

The fourth proportional to 5,388.40, 8,083.04 and 1,492.80 is: 2,239.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.40 : 8,083.04 = 1,492.80 : x
  2. Step 2: Convert to fraction form
    5,388.40/8,083.04 = 1,492.80/x
  3. Step 3: Cross multiply
    5,388.40x = 8,083.04 × 1,492.80
  4. Step 4: Simplify right side
    5,388.40x = 12,066,362.11
  5. Step 5: Solve for x
    x = 12,066,362.11/5,388.40
  6. Step 6: Final answer
    x = 2,239.32

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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.