Home / 4,189.08-5,780-2,420.30

Finding the Fourth Proportional to 4,189.08, 5,780 and 2,420.30

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Solution

The fourth proportional to 4,189.08, 5,780 and 2,420.30 is: 3,339.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,189.08 : 5,780 = 2,420.30 : x
  2. Step 2: Convert to fraction form
    4,189.08/5,780 = 2,420.30/x
  3. Step 3: Cross multiply
    4,189.08x = 5,780 × 2,420.30
  4. Step 4: Simplify right side
    4,189.08x = 13,989,334.00
  5. Step 5: Solve for x
    x = 13,989,334.00/4,189.08
  6. Step 6: Final answer
    x = 3,339.48

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1.5x scale

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.