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Finding the Fourth Proportional to 1,008.03, 1,391.42 and 635.63

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Solution

The fourth proportional to 1,008.03, 1,391.42 and 635.63 is: 877.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.03 : 1,391.42 = 635.63 : x
  2. Step 2: Convert to fraction form
    1,008.03/1,391.42 = 635.63/x
  3. Step 3: Cross multiply
    1,008.03x = 1,391.42 × 635.63
  4. Step 4: Simplify right side
    1,008.03x = 884,418.16
  5. Step 5: Solve for x
    x = 884,418.16/1,008.03
  6. Step 6: Final answer
    x = 877.38

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Half scale
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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.