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Finding the Fourth Proportional to 994.16, 1,372.04 and 635.50

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Solution

The fourth proportional to 994.16, 1,372.04 and 635.50 is: 877.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.16 : 1,372.04 = 635.50 : x
  2. Step 2: Convert to fraction form
    994.16/1,372.04 = 635.50/x
  3. Step 3: Cross multiply
    994.16x = 1,372.04 × 635.50
  4. Step 4: Simplify right side
    994.16x = 871,931.42
  5. Step 5: Solve for x
    x = 871,931.42/994.16
  6. Step 6: Final answer
    x = 877.05

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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.