Home / 1,988.96-2,746.37-1,778.76

Finding the Fourth Proportional to 1,988.96, 2,746.37 and 1,778.76

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Solution

The fourth proportional to 1,988.96, 2,746.37 and 1,778.76 is: 2,456.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.96 : 2,746.37 = 1,778.76 : x
  2. Step 2: Convert to fraction form
    1,988.96/2,746.37 = 1,778.76/x
  3. Step 3: Cross multiply
    1,988.96x = 2,746.37 × 1,778.76
  4. Step 4: Simplify right side
    1,988.96x = 4,885,137.55
  5. Step 5: Solve for x
    x = 4,885,137.55/1,988.96
  6. Step 6: Final answer
    x = 2,456.13

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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.