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Finding the Fourth Proportional to 3,830.72, 5,746.46 and 1,490.90

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Solution

The fourth proportional to 3,830.72, 5,746.46 and 1,490.90 is: 2,236.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,830.72 : 5,746.46 = 1,490.90 : x
  2. Step 2: Convert to fraction form
    3,830.72/5,746.46 = 1,490.90/x
  3. Step 3: Cross multiply
    3,830.72x = 5,746.46 × 1,490.90
  4. Step 4: Simplify right side
    3,830.72x = 8,567,404.13
  5. Step 5: Solve for x
    x = 8,567,404.13/3,830.72
  6. Step 6: Final answer
    x = 2,236.50

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1.5x scale

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.