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Finding the Fourth Proportional to 2,520.37, 3,780.56 and 671.63

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Solution

The fourth proportional to 2,520.37, 3,780.56 and 671.63 is: 1,007.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.37 : 3,780.56 = 671.63 : x
  2. Step 2: Convert to fraction form
    2,520.37/3,780.56 = 671.63/x
  3. Step 3: Cross multiply
    2,520.37x = 3,780.56 × 671.63
  4. Step 4: Simplify right side
    2,520.37x = 2,539,137.51
  5. Step 5: Solve for x
    x = 2,539,137.51/2,520.37
  6. Step 6: Final answer
    x = 1,007.45

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Similar ratio
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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.