Home / 2,902.78-4,005.75-2,120.14

Finding the Fourth Proportional to 2,902.78, 4,005.75 and 2,120.14

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Solution

The fourth proportional to 2,902.78, 4,005.75 and 2,120.14 is: 2,925.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,902.78 : 4,005.75 = 2,120.14 : x
  2. Step 2: Convert to fraction form
    2,902.78/4,005.75 = 2,120.14/x
  3. Step 3: Cross multiply
    2,902.78x = 4,005.75 × 2,120.14
  4. Step 4: Simplify right side
    2,902.78x = 8,492,750.81
  5. Step 5: Solve for x
    x = 8,492,750.81/2,902.78
  6. Step 6: Final answer
    x = 2,925.73

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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.