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Finding the Fourth Proportional to 1,817.79, 2,718.36 and 1,355.91

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Solution

The fourth proportional to 1,817.79, 2,718.36 and 1,355.91 is: 2,027.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.79 : 2,718.36 = 1,355.91 : x
  2. Step 2: Convert to fraction form
    1,817.79/2,718.36 = 1,355.91/x
  3. Step 3: Cross multiply
    1,817.79x = 2,718.36 × 1,355.91
  4. Step 4: Simplify right side
    1,817.79x = 3,685,851.51
  5. Step 5: Solve for x
    x = 3,685,851.51/1,817.79
  6. Step 6: Final answer
    x = 2,027.66

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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.