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Finding the Fourth Proportional to 378.76, 561.04 and 374.44

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Solution

The fourth proportional to 378.76, 561.04 and 374.44 is: 554.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.76 : 561.04 = 374.44 : x
  2. Step 2: Convert to fraction form
    378.76/561.04 = 374.44/x
  3. Step 3: Cross multiply
    378.76x = 561.04 × 374.44
  4. Step 4: Simplify right side
    378.76x = 210,075.82
  5. Step 5: Solve for x
    x = 210,075.82/378.76
  6. Step 6: Final answer
    x = 554.64

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.