Home / 3,429.95-4,731.21-2,988.90

Finding the Fourth Proportional to 3,429.95, 4,731.21 and 2,988.90

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Solution

The fourth proportional to 3,429.95, 4,731.21 and 2,988.90 is: 4,122.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,429.95 : 4,731.21 = 2,988.90 : x
  2. Step 2: Convert to fraction form
    3,429.95/4,731.21 = 2,988.90/x
  3. Step 3: Cross multiply
    3,429.95x = 4,731.21 × 2,988.90
  4. Step 4: Simplify right side
    3,429.95x = 14,141,113.57
  5. Step 5: Solve for x
    x = 14,141,113.57/3,429.95
  6. Step 6: Final answer
    x = 4,122.84

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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.