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Finding the Fourth Proportional to 2,800.40, 4,203.80 and 1,646.80

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Solution

The fourth proportional to 2,800.40, 4,203.80 and 1,646.80 is: 2,472.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.40 : 4,203.80 = 1,646.80 : x
  2. Step 2: Convert to fraction form
    2,800.40/4,203.80 = 1,646.80/x
  3. Step 3: Cross multiply
    2,800.40x = 4,203.80 × 1,646.80
  4. Step 4: Simplify right side
    2,800.40x = 6,922,817.84
  5. Step 5: Solve for x
    x = 6,922,817.84/2,800.40
  6. Step 6: Final answer
    x = 2,472.08

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1.5x scale

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.