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Finding the Fourth Proportional to 1,492.31, 2,059.45 and 829.22

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Solution

The fourth proportional to 1,492.31, 2,059.45 and 829.22 is: 1,144.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,492.31 : 2,059.45 = 829.22 : x
  2. Step 2: Convert to fraction form
    1,492.31/2,059.45 = 829.22/x
  3. Step 3: Cross multiply
    1,492.31x = 2,059.45 × 829.22
  4. Step 4: Simplify right side
    1,492.31x = 1,707,740.20
  5. Step 5: Solve for x
    x = 1,707,740.20/1,492.31
  6. Step 6: Final answer
    x = 1,144.36

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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.