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Finding the Fourth Proportional to 1,727.84, 2,384.44 and 981.81

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Solution

The fourth proportional to 1,727.84, 2,384.44 and 981.81 is: 1,354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.84 : 2,384.44 = 981.81 : x
  2. Step 2: Convert to fraction form
    1,727.84/2,384.44 = 981.81/x
  3. Step 3: Cross multiply
    1,727.84x = 2,384.44 × 981.81
  4. Step 4: Simplify right side
    1,727.84x = 2,341,064.58
  5. Step 5: Solve for x
    x = 2,341,064.58/1,727.84
  6. Step 6: Final answer
    x = 1,354.91

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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.