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Finding the Fourth Proportional to 1,873.03, 2,810.04 and 640.43

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Solution

The fourth proportional to 1,873.03, 2,810.04 and 640.43 is: 960.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.03 : 2,810.04 = 640.43 : x
  2. Step 2: Convert to fraction form
    1,873.03/2,810.04 = 640.43/x
  3. Step 3: Cross multiply
    1,873.03x = 2,810.04 × 640.43
  4. Step 4: Simplify right side
    1,873.03x = 1,799,642.05
  5. Step 5: Solve for x
    x = 1,799,642.05/1,873.03
  6. Step 6: Final answer
    x = 960.82

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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.