Home / 3,386.78-4,673.40-1,970.20

Finding the Fourth Proportional to 3,386.78, 4,673.40 and 1,970.20

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Solution

The fourth proportional to 3,386.78, 4,673.40 and 1,970.20 is: 2,718.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,386.78 : 4,673.40 = 1,970.20 : x
  2. Step 2: Convert to fraction form
    3,386.78/4,673.40 = 1,970.20/x
  3. Step 3: Cross multiply
    3,386.78x = 4,673.40 × 1,970.20
  4. Step 4: Simplify right side
    3,386.78x = 9,207,532.68
  5. Step 5: Solve for x
    x = 9,207,532.68/3,386.78
  6. Step 6: Final answer
    x = 2,718.67

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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.