Home / 780,142.80-1,170,214.20-380,577.90

Finding the Fourth Proportional to 780,142.80, 1,170,214.20 and 380,577.90

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Solution

The fourth proportional to 780,142.80, 1,170,214.20 and 380,577.90 is: 570,866.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,142.80 : 1,170,214.20 = 380,577.90 : x
  2. Step 2: Convert to fraction form
    780,142.80/1,170,214.20 = 380,577.90/x
  3. Step 3: Cross multiply
    780,142.80x = 1,170,214.20 × 380,577.90
  4. Step 4: Simplify right side
    780,142.80x = 445,357,662,786.18
  5. Step 5: Solve for x
    x = 445,357,662,786.18/780,142.80
  6. Step 6: Final answer
    x = 570,866.85

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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.