Home / 920,072.42-1,269,610.90-678,485.06

Finding the Fourth Proportional to 920,072.42, 1,269,610.90 and 678,485.06

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Solution

The fourth proportional to 920,072.42, 1,269,610.90 and 678,485.06 is: 936,243.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,072.42 : 1,269,610.90 = 678,485.06 : x
  2. Step 2: Convert to fraction form
    920,072.42/1,269,610.90 = 678,485.06/x
  3. Step 3: Cross multiply
    920,072.42x = 1,269,610.90 × 678,485.06
  4. Step 4: Simplify right side
    920,072.42x = 861,412,019,618.89
  5. Step 5: Solve for x
    x = 861,412,019,618.89/920,072.42
  6. Step 6: Final answer
    x = 936,243.72

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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.