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Finding the Fourth Proportional to 1,069.47, 1,603.80 and 376.11

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Solution

The fourth proportional to 1,069.47, 1,603.80 and 376.11 is: 564.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.47 : 1,603.80 = 376.11 : x
  2. Step 2: Convert to fraction form
    1,069.47/1,603.80 = 376.11/x
  3. Step 3: Cross multiply
    1,069.47x = 1,603.80 × 376.11
  4. Step 4: Simplify right side
    1,069.47x = 603,205.22
  5. Step 5: Solve for x
    x = 603,205.22/1,069.47
  6. Step 6: Final answer
    x = 564.02

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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.