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Finding the Fourth Proportional to 1,991,175.04, 2,985,828.48 and 728,119.36

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Solution

The fourth proportional to 1,991,175.04, 2,985,828.48 and 728,119.36 is: 1,091,837.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991,175.04 : 2,985,828.48 = 728,119.36 : x
  2. Step 2: Convert to fraction form
    1,991,175.04/2,985,828.48 = 728,119.36/x
  3. Step 3: Cross multiply
    1,991,175.04x = 2,985,828.48 × 728,119.36
  4. Step 4: Simplify right side
    1,991,175.04x = 2,174,039,521,927.37
  5. Step 5: Solve for x
    x = 2,174,039,521,927.37/1,991,175.04
  6. Step 6: Final answer
    x = 1,091,837.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.