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Finding the Fourth Proportional to 1,774.44, 2,448.72 and 988.64

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Solution

The fourth proportional to 1,774.44, 2,448.72 and 988.64 is: 1,364.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,774.44 : 2,448.72 = 988.64 : x
  2. Step 2: Convert to fraction form
    1,774.44/2,448.72 = 988.64/x
  3. Step 3: Cross multiply
    1,774.44x = 2,448.72 × 988.64
  4. Step 4: Simplify right side
    1,774.44x = 2,420,902.54
  5. Step 5: Solve for x
    x = 2,420,902.54/1,774.44
  6. Step 6: Final answer
    x = 1,364.32

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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.