Home / 2,988.39-4,120.77-1,868.93

Finding the Fourth Proportional to 2,988.39, 4,120.77 and 1,868.93

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Solution

The fourth proportional to 2,988.39, 4,120.77 and 1,868.93 is: 2,577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.39 : 4,120.77 = 1,868.93 : x
  2. Step 2: Convert to fraction form
    2,988.39/4,120.77 = 1,868.93/x
  3. Step 3: Cross multiply
    2,988.39x = 4,120.77 × 1,868.93
  4. Step 4: Simplify right side
    2,988.39x = 7,701,410.07
  5. Step 5: Solve for x
    x = 7,701,410.07/2,988.39
  6. Step 6: Final answer
    x = 2,577.11

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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.