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Finding the Fourth Proportional to 1,879.20, 2,815.64 and 903.16

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Solution

The fourth proportional to 1,879.20, 2,815.64 and 903.16 is: 1,353.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.20 : 2,815.64 = 903.16 : x
  2. Step 2: Convert to fraction form
    1,879.20/2,815.64 = 903.16/x
  3. Step 3: Cross multiply
    1,879.20x = 2,815.64 × 903.16
  4. Step 4: Simplify right side
    1,879.20x = 2,542,973.42
  5. Step 5: Solve for x
    x = 2,542,973.42/1,879.20
  6. Step 6: Final answer
    x = 1,353.22

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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.