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Finding the Fourth Proportional to 1,368.17, 2,051.81 and 443.51

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Solution

The fourth proportional to 1,368.17, 2,051.81 and 443.51 is: 665.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.17 : 2,051.81 = 443.51 : x
  2. Step 2: Convert to fraction form
    1,368.17/2,051.81 = 443.51/x
  3. Step 3: Cross multiply
    1,368.17x = 2,051.81 × 443.51
  4. Step 4: Simplify right side
    1,368.17x = 909,989.10
  5. Step 5: Solve for x
    x = 909,989.10/1,368.17
  6. Step 6: Final answer
    x = 665.12

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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.