Home / 1,521,126.30-2,100,576.72-978,204.90

Finding the Fourth Proportional to 1,521,126.30, 2,100,576.72 and 978,204.90

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Solution

The fourth proportional to 1,521,126.30, 2,100,576.72 and 978,204.90 is: 1,350,837.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521,126.30 : 2,100,576.72 = 978,204.90 : x
  2. Step 2: Convert to fraction form
    1,521,126.30/2,100,576.72 = 978,204.90/x
  3. Step 3: Cross multiply
    1,521,126.30x = 2,100,576.72 × 978,204.90
  4. Step 4: Simplify right side
    1,521,126.30x = 2,054,794,440,329.93
  5. Step 5: Solve for x
    x = 2,054,794,440,329.93/1,521,126.30
  6. Step 6: Final answer
    x = 1,350,837.49

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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.