Home / 2,918.51-4,374.66-1,991.77

Finding the Fourth Proportional to 2,918.51, 4,374.66 and 1,991.77

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Solution

The fourth proportional to 2,918.51, 4,374.66 and 1,991.77 is: 2,985.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.51 : 4,374.66 = 1,991.77 : x
  2. Step 2: Convert to fraction form
    2,918.51/4,374.66 = 1,991.77/x
  3. Step 3: Cross multiply
    2,918.51x = 4,374.66 × 1,991.77
  4. Step 4: Simplify right side
    2,918.51x = 8,713,316.55
  5. Step 5: Solve for x
    x = 8,713,316.55/2,918.51
  6. Step 6: Final answer
    x = 2,985.54

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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.