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Finding the Fourth Proportional to 635.77, 877.40 and 373.78

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Solution

The fourth proportional to 635.77, 877.40 and 373.78 is: 515.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.77 : 877.40 = 373.78 : x
  2. Step 2: Convert to fraction form
    635.77/877.40 = 373.78/x
  3. Step 3: Cross multiply
    635.77x = 877.40 × 373.78
  4. Step 4: Simplify right side
    635.77x = 327,954.57
  5. Step 5: Solve for x
    x = 327,954.57/635.77
  6. Step 6: Final answer
    x = 515.84

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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.