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Finding the Fourth Proportional to 1,008.14, 1,392.06 and 635.72

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Solution

The fourth proportional to 1,008.14, 1,392.06 and 635.72 is: 877.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.14 : 1,392.06 = 635.72 : x
  2. Step 2: Convert to fraction form
    1,008.14/1,392.06 = 635.72/x
  3. Step 3: Cross multiply
    1,008.14x = 1,392.06 × 635.72
  4. Step 4: Simplify right side
    1,008.14x = 884,960.38
  5. Step 5: Solve for x
    x = 884,960.38/1,008.14
  6. Step 6: Final answer
    x = 877.81

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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.