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Finding the Fourth Proportional to 1,148.81, 1,721.66 and 628.03

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Solution

The fourth proportional to 1,148.81, 1,721.66 and 628.03 is: 941.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.81 : 1,721.66 = 628.03 : x
  2. Step 2: Convert to fraction form
    1,148.81/1,721.66 = 628.03/x
  3. Step 3: Cross multiply
    1,148.81x = 1,721.66 × 628.03
  4. Step 4: Simplify right side
    1,148.81x = 1,081,251.40
  5. Step 5: Solve for x
    x = 1,081,251.40/1,148.81
  6. Step 6: Final answer
    x = 941.19

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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.