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Finding the Fourth Proportional to 857.48, 1,183.83 and 563.26

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Solution

The fourth proportional to 857.48, 1,183.83 and 563.26 is: 777.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.48 : 1,183.83 = 563.26 : x
  2. Step 2: Convert to fraction form
    857.48/1,183.83 = 563.26/x
  3. Step 3: Cross multiply
    857.48x = 1,183.83 × 563.26
  4. Step 4: Simplify right side
    857.48x = 666,795.35
  5. Step 5: Solve for x
    x = 666,795.35/857.48
  6. Step 6: Final answer
    x = 777.63

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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.