Home / 780,013.80-1,170,020.70-425,719.80

Finding the Fourth Proportional to 780,013.80, 1,170,020.70 and 425,719.80

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Solution

The fourth proportional to 780,013.80, 1,170,020.70 and 425,719.80 is: 638,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,013.80 : 1,170,020.70 = 425,719.80 : x
  2. Step 2: Convert to fraction form
    780,013.80/1,170,020.70 = 425,719.80/x
  3. Step 3: Cross multiply
    780,013.80x = 1,170,020.70 × 425,719.80
  4. Step 4: Simplify right side
    780,013.80x = 498,100,978,399.86
  5. Step 5: Solve for x
    x = 498,100,978,399.86/780,013.80
  6. Step 6: Final answer
    x = 638,579.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.