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Finding the Fourth Proportional to 1,768.36, 2,440.36 and 971.75

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Solution

The fourth proportional to 1,768.36, 2,440.36 and 971.75 is: 1,341.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.36 : 2,440.36 = 971.75 : x
  2. Step 2: Convert to fraction form
    1,768.36/2,440.36 = 971.75/x
  3. Step 3: Cross multiply
    1,768.36x = 2,440.36 × 971.75
  4. Step 4: Simplify right side
    1,768.36x = 2,371,419.83
  5. Step 5: Solve for x
    x = 2,371,419.83/1,768.36
  6. Step 6: Final answer
    x = 1,341.03

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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.