Home / 715,986.27-988,057.53-421,806.78

Finding the Fourth Proportional to 715,986.27, 988,057.53 and 421,806.78

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Solution

The fourth proportional to 715,986.27, 988,057.53 and 421,806.78 is: 582,091.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,986.27 : 988,057.53 = 421,806.78 : x
  2. Step 2: Convert to fraction form
    715,986.27/988,057.53 = 421,806.78/x
  3. Step 3: Cross multiply
    715,986.27x = 988,057.53 × 421,806.78
  4. Step 4: Simplify right side
    715,986.27x = 416,769,365,184.05
  5. Step 5: Solve for x
    x = 416,769,365,184.05/715,986.27
  6. Step 6: Final answer
    x = 582,091.28

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1.5x scale

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.