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Finding the Fourth Proportional to 3,474.64, 5,211.51 and 877.42

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Solution

The fourth proportional to 3,474.64, 5,211.51 and 877.42 is: 1,316.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,474.64 : 5,211.51 = 877.42 : x
  2. Step 2: Convert to fraction form
    3,474.64/5,211.51 = 877.42/x
  3. Step 3: Cross multiply
    3,474.64x = 5,211.51 × 877.42
  4. Step 4: Simplify right side
    3,474.64x = 4,572,683.10
  5. Step 5: Solve for x
    x = 4,572,683.10/3,474.64
  6. Step 6: Final answer
    x = 1,316.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.