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Finding the Fourth Proportional to 1,492.63, 2,059.63 and 820.33

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Solution

The fourth proportional to 1,492.63, 2,059.63 and 820.33 is: 1,131.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.63 : 2,059.63 = 820.33 : x
  2. Step 2: Convert to fraction form
    1,492.63/2,059.63 = 820.33/x
  3. Step 3: Cross multiply
    1,492.63x = 2,059.63 × 820.33
  4. Step 4: Simplify right side
    1,492.63x = 1,689,569.08
  5. Step 5: Solve for x
    x = 1,689,569.08/1,492.63
  6. Step 6: Final answer
    x = 1,131.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.