Home / 3,390.15-5,084.74-1,311.13

Finding the Fourth Proportional to 3,390.15, 5,084.74 and 1,311.13

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Solution

The fourth proportional to 3,390.15, 5,084.74 and 1,311.13 is: 1,966.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.15 : 5,084.74 = 1,311.13 : x
  2. Step 2: Convert to fraction form
    3,390.15/5,084.74 = 1,311.13/x
  3. Step 3: Cross multiply
    3,390.15x = 5,084.74 × 1,311.13
  4. Step 4: Simplify right side
    3,390.15x = 6,666,763.15
  5. Step 5: Solve for x
    x = 6,666,763.15/3,390.15
  6. Step 6: Final answer
    x = 1,966.51

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1.5x scale

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.