Home / 2,988.12-4,118.10-2,315

Finding the Fourth Proportional to 2,988.12, 4,118.10 and 2,315

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Solution

The fourth proportional to 2,988.12, 4,118.10 and 2,315 is: 3,190.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.12 : 4,118.10 = 2,315 : x
  2. Step 2: Convert to fraction form
    2,988.12/4,118.10 = 2,315/x
  3. Step 3: Cross multiply
    2,988.12x = 4,118.10 × 2,315
  4. Step 4: Simplify right side
    2,988.12x = 9,533,401.50
  5. Step 5: Solve for x
    x = 9,533,401.50/2,988.12
  6. Step 6: Final answer
    x = 3,190.43

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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.