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Finding the Fourth Proportional to 2,879.51, 4,319.25 and 905.15

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Solution

The fourth proportional to 2,879.51, 4,319.25 and 905.15 is: 1,357.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.51 : 4,319.25 = 905.15 : x
  2. Step 2: Convert to fraction form
    2,879.51/4,319.25 = 905.15/x
  3. Step 3: Cross multiply
    2,879.51x = 4,319.25 × 905.15
  4. Step 4: Simplify right side
    2,879.51x = 3,909,547.54
  5. Step 5: Solve for x
    x = 3,909,547.54/2,879.51
  6. Step 6: Final answer
    x = 1,357.72

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1.5x scale

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.