Home / 2,051.31-2,829.77-1,387.92

Finding the Fourth Proportional to 2,051.31, 2,829.77 and 1,387.92

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Solution

The fourth proportional to 2,051.31, 2,829.77 and 1,387.92 is: 1,914.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,051.31 : 2,829.77 = 1,387.92 : x
  2. Step 2: Convert to fraction form
    2,051.31/2,829.77 = 1,387.92/x
  3. Step 3: Cross multiply
    2,051.31x = 2,829.77 × 1,387.92
  4. Step 4: Simplify right side
    2,051.31x = 3,927,487.44
  5. Step 5: Solve for x
    x = 3,927,487.44/2,051.31
  6. Step 6: Final answer
    x = 1,914.62

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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.