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Finding the Fourth Proportional to 2,388.77, 3,579.20 and 927.12

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Solution

The fourth proportional to 2,388.77, 3,579.20 and 927.12 is: 1,389.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,388.77 : 3,579.20 = 927.12 : x
  2. Step 2: Convert to fraction form
    2,388.77/3,579.20 = 927.12/x
  3. Step 3: Cross multiply
    2,388.77x = 3,579.20 × 927.12
  4. Step 4: Simplify right side
    2,388.77x = 3,318,347.90
  5. Step 5: Solve for x
    x = 3,318,347.90/2,388.77
  6. Step 6: Final answer
    x = 1,389.15

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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.