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Finding the Fourth Proportional to 1,767.63, 2,439.39 and 981.63

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Solution

The fourth proportional to 1,767.63, 2,439.39 and 981.63 is: 1,354.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.63 : 2,439.39 = 981.63 : x
  2. Step 2: Convert to fraction form
    1,767.63/2,439.39 = 981.63/x
  3. Step 3: Cross multiply
    1,767.63x = 2,439.39 × 981.63
  4. Step 4: Simplify right side
    1,767.63x = 2,394,578.41
  5. Step 5: Solve for x
    x = 2,394,578.41/1,767.63
  6. Step 6: Final answer
    x = 1,354.68

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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.