Home / 1,028,777.27-1,420,405.74-642,181.28

Finding the Fourth Proportional to 1,028,777.27, 1,420,405.74 and 642,181.28

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Solution

The fourth proportional to 1,028,777.27, 1,420,405.74 and 642,181.28 is: 886,642.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028,777.27 : 1,420,405.74 = 642,181.28 : x
  2. Step 2: Convert to fraction form
    1,028,777.27/1,420,405.74 = 642,181.28/x
  3. Step 3: Cross multiply
    1,028,777.27x = 1,420,405.74 × 642,181.28
  4. Step 4: Simplify right side
    1,028,777.27x = 912,157,969,130.52
  5. Step 5: Solve for x
    x = 912,157,969,130.52/1,028,777.27
  6. Step 6: Final answer
    x = 886,642.81

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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.