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Finding the Fourth Proportional to 3,315.25, 4,575.05 and 1,918.81

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Solution

The fourth proportional to 3,315.25, 4,575.05 and 1,918.81 is: 2,647.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.25 : 4,575.05 = 1,918.81 : x
  2. Step 2: Convert to fraction form
    3,315.25/4,575.05 = 1,918.81/x
  3. Step 3: Cross multiply
    3,315.25x = 4,575.05 × 1,918.81
  4. Step 4: Simplify right side
    3,315.25x = 8,778,651.69
  5. Step 5: Solve for x
    x = 8,778,651.69/3,315.25
  6. Step 6: Final answer
    x = 2,647.96

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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.