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Finding the Fourth Proportional to 28,908.40, 43,411.20 and 28,033.60

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Solution

The fourth proportional to 28,908.40, 43,411.20 and 28,033.60 is: 42,097.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.40 : 43,411.20 = 28,033.60 : x
  2. Step 2: Convert to fraction form
    28,908.40/43,411.20 = 28,033.60/x
  3. Step 3: Cross multiply
    28,908.40x = 43,411.20 × 28,033.60
  4. Step 4: Simplify right side
    28,908.40x = 1,216,972,216.32
  5. Step 5: Solve for x
    x = 1,216,972,216.32/28,908.40
  6. Step 6: Final answer
    x = 42,097.53

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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.