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Finding the Fourth Proportional to 3,879.65, 5,357.15 and 3,598.25

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Solution

The fourth proportional to 3,879.65, 5,357.15 and 3,598.25 is: 4,968.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.65 : 5,357.15 = 3,598.25 : x
  2. Step 2: Convert to fraction form
    3,879.65/5,357.15 = 3,598.25/x
  3. Step 3: Cross multiply
    3,879.65x = 5,357.15 × 3,598.25
  4. Step 4: Simplify right side
    3,879.65x = 19,276,364.99
  5. Step 5: Solve for x
    x = 19,276,364.99/3,879.65
  6. Step 6: Final answer
    x = 4,968.58

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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.