Home / 1,121,745.81-1,682,840.52-411,780

Finding the Fourth Proportional to 1,121,745.81, 1,682,840.52 and 411,780

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Solution

The fourth proportional to 1,121,745.81, 1,682,840.52 and 411,780 is: 617,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,745.81 : 1,682,840.52 = 411,780 : x
  2. Step 2: Convert to fraction form
    1,121,745.81/1,682,840.52 = 411,780/x
  3. Step 3: Cross multiply
    1,121,745.81x = 1,682,840.52 × 411,780
  4. Step 4: Simplify right side
    1,121,745.81x = 692,960,069,325.60
  5. Step 5: Solve for x
    x = 692,960,069,325.60/1,121,745.81
  6. Step 6: Final answer
    x = 617,751.42

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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.