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Finding the Fourth Proportional to 2,913.22, 4,018.18 and 1,918.18

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Solution

The fourth proportional to 2,913.22, 4,018.18 and 1,918.18 is: 2,645.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.22 : 4,018.18 = 1,918.18 : x
  2. Step 2: Convert to fraction form
    2,913.22/4,018.18 = 1,918.18/x
  3. Step 3: Cross multiply
    2,913.22x = 4,018.18 × 1,918.18
  4. Step 4: Simplify right side
    2,913.22x = 7,707,592.51
  5. Step 5: Solve for x
    x = 7,707,592.51/2,913.22
  6. Step 6: Final answer
    x = 2,645.73

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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.