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Finding the Fourth Proportional to 1,243.36, 1,865.15 and 626.75

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Solution

The fourth proportional to 1,243.36, 1,865.15 and 626.75 is: 940.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.36 : 1,865.15 = 626.75 : x
  2. Step 2: Convert to fraction form
    1,243.36/1,865.15 = 626.75/x
  3. Step 3: Cross multiply
    1,243.36x = 1,865.15 × 626.75
  4. Step 4: Simplify right side
    1,243.36x = 1,168,982.76
  5. Step 5: Solve for x
    x = 1,168,982.76/1,243.36
  6. Step 6: Final answer
    x = 940.18

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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.