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Finding the Third Proportional to 1,590 and 1,929

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Solution

The third proportional to 1,590 and 1,929 is: 2,340.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590 : 1,929 = 1,929 : x
  2. Step 2: Convert to fraction form
    1,590/1,929 = 1,929/x
  3. Step 3: Cross multiply
    1,590x = 1,929 × 1,929
  4. Step 4: Simplify right side
    1,590x = 3,721,041
  5. Step 5: Solve for x
    x = 3,721,041/1,590
  6. Step 6: Final answer
    x = 2,340.28

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.