Home / 2,208.40-3,312.60-1,981.60

Finding the Fourth Proportional to 2,208.40, 3,312.60 and 1,981.60

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Solution

The fourth proportional to 2,208.40, 3,312.60 and 1,981.60 is: 2,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.40 : 3,312.60 = 1,981.60 : x
  2. Step 2: Convert to fraction form
    2,208.40/3,312.60 = 1,981.60/x
  3. Step 3: Cross multiply
    2,208.40x = 3,312.60 × 1,981.60
  4. Step 4: Simplify right side
    2,208.40x = 6,564,248.16
  5. Step 5: Solve for x
    x = 6,564,248.16/2,208.40
  6. Step 6: Final answer
    x = 2,972.40

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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.