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Finding the Fourth Proportional to 5,428.86, 7,490.86 and 3,191.19

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Solution

The fourth proportional to 5,428.86, 7,490.86 and 3,191.19 is: 4,403.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.86 : 7,490.86 = 3,191.19 : x
  2. Step 2: Convert to fraction form
    5,428.86/7,490.86 = 3,191.19/x
  3. Step 3: Cross multiply
    5,428.86x = 7,490.86 × 3,191.19
  4. Step 4: Simplify right side
    5,428.86x = 23,904,721.45
  5. Step 5: Solve for x
    x = 23,904,721.45/5,428.86
  6. Step 6: Final answer
    x = 4,403.27

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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.