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Finding the Fourth Proportional to 1,294.88, 1,940.28 and 472.64

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Solution

The fourth proportional to 1,294.88, 1,940.28 and 472.64 is: 708.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.88 : 1,940.28 = 472.64 : x
  2. Step 2: Convert to fraction form
    1,294.88/1,940.28 = 472.64/x
  3. Step 3: Cross multiply
    1,294.88x = 1,940.28 × 472.64
  4. Step 4: Simplify right side
    1,294.88x = 917,053.94
  5. Step 5: Solve for x
    x = 917,053.94/1,294.88
  6. Step 6: Final answer
    x = 708.22

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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.