Home / 3,470.40-5,206.34-1,390.05

Finding the Fourth Proportional to 3,470.40, 5,206.34 and 1,390.05

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Solution

The fourth proportional to 3,470.40, 5,206.34 and 1,390.05 is: 2,085.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,470.40 : 5,206.34 = 1,390.05 : x
  2. Step 2: Convert to fraction form
    3,470.40/5,206.34 = 1,390.05/x
  3. Step 3: Cross multiply
    3,470.40x = 5,206.34 × 1,390.05
  4. Step 4: Simplify right side
    3,470.40x = 7,237,076.39
  5. Step 5: Solve for x
    x = 7,237,076.39/3,470.40
  6. Step 6: Final answer
    x = 2,085.37

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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.