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Finding the Fourth Proportional to 857.75, 1,183.69 and 464.77

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Solution

The fourth proportional to 857.75, 1,183.69 and 464.77 is: 641.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.75 : 1,183.69 = 464.77 : x
  2. Step 2: Convert to fraction form
    857.75/1,183.69 = 464.77/x
  3. Step 3: Cross multiply
    857.75x = 1,183.69 × 464.77
  4. Step 4: Simplify right side
    857.75x = 550,139.48
  5. Step 5: Solve for x
    x = 550,139.48/857.75
  6. Step 6: Final answer
    x = 641.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.