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Finding the Fourth Proportional to 3,315.38, 4,575.83 and 1,918.13

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Solution

The fourth proportional to 3,315.38, 4,575.83 and 1,918.13 is: 2,647.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.38 : 4,575.83 = 1,918.13 : x
  2. Step 2: Convert to fraction form
    3,315.38/4,575.83 = 1,918.13/x
  3. Step 3: Cross multiply
    3,315.38x = 4,575.83 × 1,918.13
  4. Step 4: Simplify right side
    3,315.38x = 8,777,036.80
  5. Step 5: Solve for x
    x = 8,777,036.80/3,315.38
  6. Step 6: Final answer
    x = 2,647.37

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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.