Home / 1,139,236.88-1,572,142.79-642,481.30

Finding the Fourth Proportional to 1,139,236.88, 1,572,142.79 and 642,481.30

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Solution

The fourth proportional to 1,139,236.88, 1,572,142.79 and 642,481.30 is: 886,621.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,236.88 : 1,572,142.79 = 642,481.30 : x
  2. Step 2: Convert to fraction form
    1,139,236.88/1,572,142.79 = 642,481.30/x
  3. Step 3: Cross multiply
    1,139,236.88x = 1,572,142.79 × 642,481.30
  4. Step 4: Simplify right side
    1,139,236.88x = 1,010,072,332,431.71
  5. Step 5: Solve for x
    x = 1,010,072,332,431.71/1,139,236.88
  6. Step 6: Final answer
    x = 886,621.87

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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.