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Finding the Fourth Proportional to 705.76, 1,057 and 561.56

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Solution

The fourth proportional to 705.76, 1,057 and 561.56 is: 841.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.76 : 1,057 = 561.56 : x
  2. Step 2: Convert to fraction form
    705.76/1,057 = 561.56/x
  3. Step 3: Cross multiply
    705.76x = 1,057 × 561.56
  4. Step 4: Simplify right side
    705.76x = 593,568.92
  5. Step 5: Solve for x
    x = 593,568.92/705.76
  6. Step 6: Final answer
    x = 841.04

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