Home / 1,290,452.78-1,780,870.56-709,720.80

Finding the Fourth Proportional to 1,290,452.78, 1,780,870.56 and 709,720.80

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Solution

The fourth proportional to 1,290,452.78, 1,780,870.56 and 709,720.80 is: 979,439.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,452.78 : 1,780,870.56 = 709,720.80 : x
  2. Step 2: Convert to fraction form
    1,290,452.78/1,780,870.56 = 709,720.80/x
  3. Step 3: Cross multiply
    1,290,452.78x = 1,780,870.56 × 709,720.80
  4. Step 4: Simplify right side
    1,290,452.78x = 1,263,920,879,217.33
  5. Step 5: Solve for x
    x = 1,263,920,879,217.33/1,290,452.78
  6. Step 6: Final answer
    x = 979,439.85

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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.