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Finding the Fourth Proportional to 1,798.81, 2,697.91 and 628.76

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Solution

The fourth proportional to 1,798.81, 2,697.91 and 628.76 is: 943.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,798.81 : 2,697.91 = 628.76 : x
  2. Step 2: Convert to fraction form
    1,798.81/2,697.91 = 628.76/x
  3. Step 3: Cross multiply
    1,798.81x = 2,697.91 × 628.76
  4. Step 4: Simplify right side
    1,798.81x = 1,696,343.06
  5. Step 5: Solve for x
    x = 1,696,343.06/1,798.81
  6. Step 6: Final answer
    x = 943.04

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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.