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Finding the Fourth Proportional to 3,492.65, 5,239.13 and 1,152.78

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Solution

The fourth proportional to 3,492.65, 5,239.13 and 1,152.78 is: 1,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,492.65 : 5,239.13 = 1,152.78 : x
  2. Step 2: Convert to fraction form
    3,492.65/5,239.13 = 1,152.78/x
  3. Step 3: Cross multiply
    3,492.65x = 5,239.13 × 1,152.78
  4. Step 4: Simplify right side
    3,492.65x = 6,039,558.52
  5. Step 5: Solve for x
    x = 6,039,558.52/3,492.65
  6. Step 6: Final answer
    x = 1,729.22

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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.