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Finding the Fourth Proportional to 1,645.80, 2,269.60 and 1,048.11

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Solution

The fourth proportional to 1,645.80, 2,269.60 and 1,048.11 is: 1,445.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.80 : 2,269.60 = 1,048.11 : x
  2. Step 2: Convert to fraction form
    1,645.80/2,269.60 = 1,048.11/x
  3. Step 3: Cross multiply
    1,645.80x = 2,269.60 × 1,048.11
  4. Step 4: Simplify right side
    1,645.80x = 2,378,790.46
  5. Step 5: Solve for x
    x = 2,378,790.46/1,645.80
  6. Step 6: Final answer
    x = 1,445.37

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1.5x scale

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.