Home / 3,405.20-4,699.12-1,913.12

Finding the Fourth Proportional to 3,405.20, 4,699.12 and 1,913.12

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Solution

The fourth proportional to 3,405.20, 4,699.12 and 1,913.12 is: 2,640.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.20 : 4,699.12 = 1,913.12 : x
  2. Step 2: Convert to fraction form
    3,405.20/4,699.12 = 1,913.12/x
  3. Step 3: Cross multiply
    3,405.20x = 4,699.12 × 1,913.12
  4. Step 4: Simplify right side
    3,405.20x = 8,989,980.45
  5. Step 5: Solve for x
    x = 8,989,980.45/3,405.20
  6. Step 6: Final answer
    x = 2,640.07

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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.