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Finding the Fourth Proportional to 857.80, 1,183.26 and 563.08

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Solution

The fourth proportional to 857.80, 1,183.26 and 563.08 is: 776.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.80 : 1,183.26 = 563.08 : x
  2. Step 2: Convert to fraction form
    857.80/1,183.26 = 563.08/x
  3. Step 3: Cross multiply
    857.80x = 1,183.26 × 563.08
  4. Step 4: Simplify right side
    857.80x = 666,270.04
  5. Step 5: Solve for x
    x = 666,270.04/857.80
  6. Step 6: Final answer
    x = 776.72

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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.