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Finding the Fourth Proportional to 1,731, 2,389.68 and 1,068.21

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Solution

The fourth proportional to 1,731, 2,389.68 and 1,068.21 is: 1,474.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,731 : 2,389.68 = 1,068.21 : x
  2. Step 2: Convert to fraction form
    1,731/2,389.68 = 1,068.21/x
  3. Step 3: Cross multiply
    1,731x = 2,389.68 × 1,068.21
  4. Step 4: Simplify right side
    1,731x = 2,552,680.07
  5. Step 5: Solve for x
    x = 2,552,680.07/1,731
  6. Step 6: Final answer
    x = 1,474.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.