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Finding the Third Proportional to 1,421.16 and 3,075.84

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Solution

The third proportional to 1,421.16 and 3,075.84 is: 6,657.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.16 : 3,075.84 = 3,075.84 : x
  2. Step 2: Convert to fraction form
    1,421.16/3,075.84 = 3,075.84/x
  3. Step 3: Cross multiply
    1,421.16x = 3,075.84 × 3,075.84
  4. Step 4: Simplify right side
    1,421.16x = 9,460,814.77
  5. Step 5: Solve for x
    x = 9,460,814.77/1,421.16
  6. Step 6: Final answer
    x = 6,657.12

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.