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Finding the Fourth Proportional to 786.56, 1,180.56 and 603.36

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Solution

The fourth proportional to 786.56, 1,180.56 and 603.36 is: 905.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.56 : 1,180.56 = 603.36 : x
  2. Step 2: Convert to fraction form
    786.56/1,180.56 = 603.36/x
  3. Step 3: Cross multiply
    786.56x = 1,180.56 × 603.36
  4. Step 4: Simplify right side
    786.56x = 712,302.68
  5. Step 5: Solve for x
    x = 712,302.68/786.56
  6. Step 6: Final answer
    x = 905.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.