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Finding the Fourth Proportional to 5,776.72, 7,972.92 and 3,420.04

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Solution

The fourth proportional to 5,776.72, 7,972.92 and 3,420.04 is: 4,720.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,776.72 : 7,972.92 = 3,420.04 : x
  2. Step 2: Convert to fraction form
    5,776.72/7,972.92 = 3,420.04/x
  3. Step 3: Cross multiply
    5,776.72x = 7,972.92 × 3,420.04
  4. Step 4: Simplify right side
    5,776.72x = 27,267,705.32
  5. Step 5: Solve for x
    x = 27,267,705.32/5,776.72
  6. Step 6: Final answer
    x = 4,720.27

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1.5x scale

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.