Home / 3,988.42-5,503.47-2,219.78

Finding the Fourth Proportional to 3,988.42, 5,503.47 and 2,219.78

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Solution

The fourth proportional to 3,988.42, 5,503.47 and 2,219.78 is: 3,062.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.42 : 5,503.47 = 2,219.78 : x
  2. Step 2: Convert to fraction form
    3,988.42/5,503.47 = 2,219.78/x
  3. Step 3: Cross multiply
    3,988.42x = 5,503.47 × 2,219.78
  4. Step 4: Simplify right side
    3,988.42x = 12,216,492.64
  5. Step 5: Solve for x
    x = 12,216,492.64/3,988.42
  6. Step 6: Final answer
    x = 3,062.99

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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.