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Finding the Fourth Proportional to 1,603.75, 2,211.76 and 1,043.70

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Solution

The fourth proportional to 1,603.75, 2,211.76 and 1,043.70 is: 1,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.75 : 2,211.76 = 1,043.70 : x
  2. Step 2: Convert to fraction form
    1,603.75/2,211.76 = 1,043.70/x
  3. Step 3: Cross multiply
    1,603.75x = 2,211.76 × 1,043.70
  4. Step 4: Simplify right side
    1,603.75x = 2,308,416.83
  5. Step 5: Solve for x
    x = 2,308,416.83/1,603.75
  6. Step 6: Final answer
    x = 1,439.39

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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.