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Finding the Fourth Proportional to 5,369.45, 7,409.90 and 2,979.47

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Solution

The fourth proportional to 5,369.45, 7,409.90 and 2,979.47 is: 4,111.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,369.45 : 7,409.90 = 2,979.47 : x
  2. Step 2: Convert to fraction form
    5,369.45/7,409.90 = 2,979.47/x
  3. Step 3: Cross multiply
    5,369.45x = 7,409.90 × 2,979.47
  4. Step 4: Simplify right side
    5,369.45x = 22,077,522.81
  5. Step 5: Solve for x
    x = 22,077,522.81/5,369.45
  6. Step 6: Final answer
    x = 4,111.70

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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.