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Finding the Fourth Proportional to 3,492.84, 5,239.28 and 1,299

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Solution

The fourth proportional to 3,492.84, 5,239.28 and 1,299 is: 1,948.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,492.84 : 5,239.28 = 1,299 : x
  2. Step 2: Convert to fraction form
    3,492.84/5,239.28 = 1,299/x
  3. Step 3: Cross multiply
    3,492.84x = 5,239.28 × 1,299
  4. Step 4: Simplify right side
    3,492.84x = 6,805,824.72
  5. Step 5: Solve for x
    x = 6,805,824.72/3,492.84
  6. Step 6: Final answer
    x = 1,948.51

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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.