Home / 3,428.40-4,729.72-2,641.20

Finding the Fourth Proportional to 3,428.40, 4,729.72 and 2,641.20

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Solution

The fourth proportional to 3,428.40, 4,729.72 and 2,641.20 is: 3,643.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.40 : 4,729.72 = 2,641.20 : x
  2. Step 2: Convert to fraction form
    3,428.40/4,729.72 = 2,641.20/x
  3. Step 3: Cross multiply
    3,428.40x = 4,729.72 × 2,641.20
  4. Step 4: Simplify right side
    3,428.40x = 12,492,136.46
  5. Step 5: Solve for x
    x = 12,492,136.46/3,428.40
  6. Step 6: Final answer
    x = 3,643.72

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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.