Home / 5,148.72-7,720.31-1,637.77

Finding the Fourth Proportional to 5,148.72, 7,720.31 and 1,637.77

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Solution

The fourth proportional to 5,148.72, 7,720.31 and 1,637.77 is: 2,455.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.72 : 7,720.31 = 1,637.77 : x
  2. Step 2: Convert to fraction form
    5,148.72/7,720.31 = 1,637.77/x
  3. Step 3: Cross multiply
    5,148.72x = 7,720.31 × 1,637.77
  4. Step 4: Simplify right side
    5,148.72x = 12,644,092.11
  5. Step 5: Solve for x
    x = 12,644,092.11/5,148.72
  6. Step 6: Final answer
    x = 2,455.78

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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.