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Finding the Third Proportional to 1,590.50 and 3,455

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Solution

The third proportional to 1,590.50 and 3,455 is: 7,505.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.50 : 3,455 = 3,455 : x
  2. Step 2: Convert to fraction form
    1,590.50/3,455 = 3,455/x
  3. Step 3: Cross multiply
    1,590.50x = 3,455 × 3,455
  4. Step 4: Simplify right side
    1,590.50x = 11,937,025
  5. Step 5: Solve for x
    x = 11,937,025/1,590.50
  6. Step 6: Final answer
    x = 7,505.20

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.