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Finding the Fourth Proportional to 3,698.45, 5,075.45 and 3,489.77

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Solution

The fourth proportional to 3,698.45, 5,075.45 and 3,489.77 is: 4,789.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,698.45 : 5,075.45 = 3,489.77 : x
  2. Step 2: Convert to fraction form
    3,698.45/5,075.45 = 3,489.77/x
  3. Step 3: Cross multiply
    3,698.45x = 5,075.45 × 3,489.77
  4. Step 4: Simplify right side
    3,698.45x = 17,712,110.32
  5. Step 5: Solve for x
    x = 17,712,110.32/3,698.45
  6. Step 6: Final answer
    x = 4,789.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.