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Finding the Fourth Proportional to 28,240.80, 42,361.20 and 27,722.40

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Solution

The fourth proportional to 28,240.80, 42,361.20 and 27,722.40 is: 41,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.80 : 42,361.20 = 27,722.40 : x
  2. Step 2: Convert to fraction form
    28,240.80/42,361.20 = 27,722.40/x
  3. Step 3: Cross multiply
    28,240.80x = 42,361.20 × 27,722.40
  4. Step 4: Simplify right side
    28,240.80x = 1,174,354,130.88
  5. Step 5: Solve for x
    x = 1,174,354,130.88/28,240.80
  6. Step 6: Final answer
    x = 41,583.60

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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.