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Finding the Fourth Proportional to 2,008.78, 3,013.44 and 912.58

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Solution

The fourth proportional to 2,008.78, 3,013.44 and 912.58 is: 1,368.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,008.78 : 3,013.44 = 912.58 : x
  2. Step 2: Convert to fraction form
    2,008.78/3,013.44 = 912.58/x
  3. Step 3: Cross multiply
    2,008.78x = 3,013.44 × 912.58
  4. Step 4: Simplify right side
    2,008.78x = 2,750,005.08
  5. Step 5: Solve for x
    x = 2,750,005.08/2,008.78
  6. Step 6: Final answer
    x = 1,368.99

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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.