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Finding the Fourth Proportional to 857.66, 1,183.68 and 637.24

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Solution

The fourth proportional to 857.66, 1,183.68 and 637.24 is: 879.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.66 : 1,183.68 = 637.24 : x
  2. Step 2: Convert to fraction form
    857.66/1,183.68 = 637.24/x
  3. Step 3: Cross multiply
    857.66x = 1,183.68 × 637.24
  4. Step 4: Simplify right side
    857.66x = 754,288.24
  5. Step 5: Solve for x
    x = 754,288.24/857.66
  6. Step 6: Final answer
    x = 879.47

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Double scale
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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.