Home / 780,019.80-1,170,029.70-442,930.20

Finding the Fourth Proportional to 780,019.80, 1,170,029.70 and 442,930.20

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Solution

The fourth proportional to 780,019.80, 1,170,029.70 and 442,930.20 is: 664,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,019.80 : 1,170,029.70 = 442,930.20 : x
  2. Step 2: Convert to fraction form
    780,019.80/1,170,029.70 = 442,930.20/x
  3. Step 3: Cross multiply
    780,019.80x = 1,170,029.70 × 442,930.20
  4. Step 4: Simplify right side
    780,019.80x = 518,241,489,026.94
  5. Step 5: Solve for x
    x = 518,241,489,026.94/780,019.80
  6. Step 6: Final answer
    x = 664,395.30

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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.