Home / 2,980.52-4,111.88-1,720.68

Finding the Fourth Proportional to 2,980.52, 4,111.88 and 1,720.68

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Solution

The fourth proportional to 2,980.52, 4,111.88 and 1,720.68 is: 2,373.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.52 : 4,111.88 = 1,720.68 : x
  2. Step 2: Convert to fraction form
    2,980.52/4,111.88 = 1,720.68/x
  3. Step 3: Cross multiply
    2,980.52x = 4,111.88 × 1,720.68
  4. Step 4: Simplify right side
    2,980.52x = 7,075,212.11
  5. Step 5: Solve for x
    x = 7,075,212.11/2,980.52
  6. Step 6: Final answer
    x = 2,373.82

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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.