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Finding the Fourth Proportional to 1,774.39, 2,448.64 and 988.48

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Solution

The fourth proportional to 1,774.39, 2,448.64 and 988.48 is: 1,364.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,774.39 : 2,448.64 = 988.48 : x
  2. Step 2: Convert to fraction form
    1,774.39/2,448.64 = 988.48/x
  3. Step 3: Cross multiply
    1,774.39x = 2,448.64 × 988.48
  4. Step 4: Simplify right side
    1,774.39x = 2,420,431.67
  5. Step 5: Solve for x
    x = 2,420,431.67/1,774.39
  6. Step 6: Final answer
    x = 1,364.09

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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.