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Finding the Fourth Proportional to 1,918.07, 2,874.75 and 993.10

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Solution

The fourth proportional to 1,918.07, 2,874.75 and 993.10 is: 1,488.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.07 : 2,874.75 = 993.10 : x
  2. Step 2: Convert to fraction form
    1,918.07/2,874.75 = 993.10/x
  3. Step 3: Cross multiply
    1,918.07x = 2,874.75 × 993.10
  4. Step 4: Simplify right side
    1,918.07x = 2,854,919.06
  5. Step 5: Solve for x
    x = 2,854,919.06/1,918.07
  6. Step 6: Final answer
    x = 1,488.43

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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.