Home / 1,388,001.20-2,082,001.80-828,129.20

Finding the Fourth Proportional to 1,388,001.20, 2,082,001.80 and 828,129.20

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Solution

The fourth proportional to 1,388,001.20, 2,082,001.80 and 828,129.20 is: 1,242,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,001.20 : 2,082,001.80 = 828,129.20 : x
  2. Step 2: Convert to fraction form
    1,388,001.20/2,082,001.80 = 828,129.20/x
  3. Step 3: Cross multiply
    1,388,001.20x = 2,082,001.80 × 828,129.20
  4. Step 4: Simplify right side
    1,388,001.20x = 1,724,166,485,032.56
  5. Step 5: Solve for x
    x = 1,724,166,485,032.56/1,388,001.20
  6. Step 6: Final answer
    x = 1,242,193.80

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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.