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Finding the Fourth Proportional to 946, 1,305.84 and 635.68

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Solution

The fourth proportional to 946, 1,305.84 and 635.68 is: 877.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    946 : 1,305.84 = 635.68 : x
  2. Step 2: Convert to fraction form
    946/1,305.84 = 635.68/x
  3. Step 3: Cross multiply
    946x = 1,305.84 × 635.68
  4. Step 4: Simplify right side
    946x = 830,096.37
  5. Step 5: Solve for x
    x = 830,096.37/946
  6. Step 6: Final answer
    x = 877.48

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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.