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Finding the Fourth Proportional to 984.56, 1,358.64 and 570.56

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Solution

The fourth proportional to 984.56, 1,358.64 and 570.56 is: 787.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.56 : 1,358.64 = 570.56 : x
  2. Step 2: Convert to fraction form
    984.56/1,358.64 = 570.56/x
  3. Step 3: Cross multiply
    984.56x = 1,358.64 × 570.56
  4. Step 4: Simplify right side
    984.56x = 775,185.64
  5. Step 5: Solve for x
    x = 775,185.64/984.56
  6. Step 6: Final answer
    x = 787.34

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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.