Home / 1,222,189.76-1,686,640.20-678,360.80

Finding the Fourth Proportional to 1,222,189.76, 1,686,640.20 and 678,360.80

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Solution

The fourth proportional to 1,222,189.76, 1,686,640.20 and 678,360.80 is: 936,148.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,189.76 : 1,686,640.20 = 678,360.80 : x
  2. Step 2: Convert to fraction form
    1,222,189.76/1,686,640.20 = 678,360.80/x
  3. Step 3: Cross multiply
    1,222,189.76x = 1,686,640.20 × 678,360.80
  4. Step 4: Simplify right side
    1,222,189.76x = 1,144,150,595,384.16
  5. Step 5: Solve for x
    x = 1,144,150,595,384.16/1,222,189.76
  6. Step 6: Final answer
    x = 936,148.08

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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.