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Finding the Fourth Proportional to 733.78, 1,012.40 and 472.14

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Solution

The fourth proportional to 733.78, 1,012.40 and 472.14 is: 651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    733.78 : 1,012.40 = 472.14 : x
  2. Step 2: Convert to fraction form
    733.78/1,012.40 = 472.14/x
  3. Step 3: Cross multiply
    733.78x = 1,012.40 × 472.14
  4. Step 4: Simplify right side
    733.78x = 477,994.54
  5. Step 5: Solve for x
    x = 477,994.54/733.78
  6. Step 6: Final answer
    x = 651.41

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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.