Home / 2,808.95-4,214.28-1,988.81

Finding the Fourth Proportional to 2,808.95, 4,214.28 and 1,988.81

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Solution

The fourth proportional to 2,808.95, 4,214.28 and 1,988.81 is: 2,983.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.95 : 4,214.28 = 1,988.81 : x
  2. Step 2: Convert to fraction form
    2,808.95/4,214.28 = 1,988.81/x
  3. Step 3: Cross multiply
    2,808.95x = 4,214.28 × 1,988.81
  4. Step 4: Simplify right side
    2,808.95x = 8,381,402.21
  5. Step 5: Solve for x
    x = 8,381,402.21/2,808.95
  6. Step 6: Final answer
    x = 2,983.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.