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Finding the Fourth Proportional to 1,812.56, 2,718.17 and 626.30

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Solution

The fourth proportional to 1,812.56, 2,718.17 and 626.30 is: 939.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.56 : 2,718.17 = 626.30 : x
  2. Step 2: Convert to fraction form
    1,812.56/2,718.17 = 626.30/x
  3. Step 3: Cross multiply
    1,812.56x = 2,718.17 × 626.30
  4. Step 4: Simplify right side
    1,812.56x = 1,702,376.28
  5. Step 5: Solve for x
    x = 1,702,376.28/1,812.56
  6. Step 6: Final answer
    x = 939.21

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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.