Home / 2,818.51-3,887.98-1,639.45

Finding the Fourth Proportional to 2,818.51, 3,887.98 and 1,639.45

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Solution

The fourth proportional to 2,818.51, 3,887.98 and 1,639.45 is: 2,261.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.51 : 3,887.98 = 1,639.45 : x
  2. Step 2: Convert to fraction form
    2,818.51/3,887.98 = 1,639.45/x
  3. Step 3: Cross multiply
    2,818.51x = 3,887.98 × 1,639.45
  4. Step 4: Simplify right side
    2,818.51x = 6,374,148.81
  5. Step 5: Solve for x
    x = 6,374,148.81/2,818.51
  6. Step 6: Final answer
    x = 2,261.53

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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.