Home / 1,290,422-1,780,782.36-725,174

Finding the Fourth Proportional to 1,290,422, 1,780,782.36 and 725,174

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Solution

The fourth proportional to 1,290,422, 1,780,782.36 and 725,174 is: 1,000,740.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,422 : 1,780,782.36 = 725,174 : x
  2. Step 2: Convert to fraction form
    1,290,422/1,780,782.36 = 725,174/x
  3. Step 3: Cross multiply
    1,290,422x = 1,780,782.36 × 725,174
  4. Step 4: Simplify right side
    1,290,422x = 1,291,377,067,130.64
  5. Step 5: Solve for x
    x = 1,291,377,067,130.64/1,290,422
  6. Step 6: Final answer
    x = 1,000,740.12

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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.