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Finding the Fourth Proportional to 1,294.81, 1,942.42 and 429.33

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Solution

The fourth proportional to 1,294.81, 1,942.42 and 429.33 is: 644.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.81 : 1,942.42 = 429.33 : x
  2. Step 2: Convert to fraction form
    1,294.81/1,942.42 = 429.33/x
  3. Step 3: Cross multiply
    1,294.81x = 1,942.42 × 429.33
  4. Step 4: Simplify right side
    1,294.81x = 833,939.18
  5. Step 5: Solve for x
    x = 833,939.18/1,294.81
  6. Step 6: Final answer
    x = 644.06

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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.