Home / 3,420.88-4,720.68-1,929.11

Finding the Fourth Proportional to 3,420.88, 4,720.68 and 1,929.11

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Solution

The fourth proportional to 3,420.88, 4,720.68 and 1,929.11 is: 2,662.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.88 : 4,720.68 = 1,929.11 : x
  2. Step 2: Convert to fraction form
    3,420.88/4,720.68 = 1,929.11/x
  3. Step 3: Cross multiply
    3,420.88x = 4,720.68 × 1,929.11
  4. Step 4: Simplify right side
    3,420.88x = 9,106,710.99
  5. Step 5: Solve for x
    x = 9,106,710.99/3,420.88
  6. Step 6: Final answer
    x = 2,662.10

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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.