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Finding the Fourth Proportional to 2,005.56, 3,008.67 and 618.90

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Solution

The fourth proportional to 2,005.56, 3,008.67 and 618.90 is: 928.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.56 : 3,008.67 = 618.90 : x
  2. Step 2: Convert to fraction form
    2,005.56/3,008.67 = 618.90/x
  3. Step 3: Cross multiply
    2,005.56x = 3,008.67 × 618.90
  4. Step 4: Simplify right side
    2,005.56x = 1,862,047.73
  5. Step 5: Solve for x
    x = 1,862,047.73/2,005.56
  6. Step 6: Final answer
    x = 928.45

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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.