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Finding the Fourth Proportional to 829.16, 1,243.26 and 342.14

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Solution

The fourth proportional to 829.16, 1,243.26 and 342.14 is: 513.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.16 : 1,243.26 = 342.14 : x
  2. Step 2: Convert to fraction form
    829.16/1,243.26 = 342.14/x
  3. Step 3: Cross multiply
    829.16x = 1,243.26 × 342.14
  4. Step 4: Simplify right side
    829.16x = 425,368.98
  5. Step 5: Solve for x
    x = 425,368.98/829.16
  6. Step 6: Final answer
    x = 513.01

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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.