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Finding the Fourth Proportional to 1,055.99, 1,456.91 and 636.18

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Solution

The fourth proportional to 1,055.99, 1,456.91 and 636.18 is: 877.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.99 : 1,456.91 = 636.18 : x
  2. Step 2: Convert to fraction form
    1,055.99/1,456.91 = 636.18/x
  3. Step 3: Cross multiply
    1,055.99x = 1,456.91 × 636.18
  4. Step 4: Simplify right side
    1,055.99x = 926,857.00
  5. Step 5: Solve for x
    x = 926,857.00/1,055.99
  6. Step 6: Final answer
    x = 877.71

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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.