Home / 1,988.16-2,745-1,777.68

Finding the Fourth Proportional to 1,988.16, 2,745 and 1,777.68

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Solution

The fourth proportional to 1,988.16, 2,745 and 1,777.68 is: 2,454.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.16 : 2,745 = 1,777.68 : x
  2. Step 2: Convert to fraction form
    1,988.16/2,745 = 1,777.68/x
  3. Step 3: Cross multiply
    1,988.16x = 2,745 × 1,777.68
  4. Step 4: Simplify right side
    1,988.16x = 4,879,731.60
  5. Step 5: Solve for x
    x = 4,879,731.60/1,988.16
  6. Step 6: Final answer
    x = 2,454.40

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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.