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Finding the Fourth Proportional to 1,071.83, 1,607.99 and 378.41

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Solution

The fourth proportional to 1,071.83, 1,607.99 and 378.41 is: 567.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.83 : 1,607.99 = 378.41 : x
  2. Step 2: Convert to fraction form
    1,071.83/1,607.99 = 378.41/x
  3. Step 3: Cross multiply
    1,071.83x = 1,607.99 × 378.41
  4. Step 4: Simplify right side
    1,071.83x = 608,469.56
  5. Step 5: Solve for x
    x = 608,469.56/1,071.83
  6. Step 6: Final answer
    x = 567.69

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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.