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Finding the Fourth Proportional to 5,370.86, 7,411.92 and 2,980.86

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Solution

The fourth proportional to 5,370.86, 7,411.92 and 2,980.86 is: 4,113.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,370.86 : 7,411.92 = 2,980.86 : x
  2. Step 2: Convert to fraction form
    5,370.86/7,411.92 = 2,980.86/x
  3. Step 3: Cross multiply
    5,370.86x = 7,411.92 × 2,980.86
  4. Step 4: Simplify right side
    5,370.86x = 22,093,895.85
  5. Step 5: Solve for x
    x = 22,093,895.85/5,370.86
  6. Step 6: Final answer
    x = 4,113.66

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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.