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Finding the Fourth Proportional to 300,828.80, 451,070.40 and 90,435.20

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Solution

The fourth proportional to 300,828.80, 451,070.40 and 90,435.20 is: 135,600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,828.80 : 451,070.40 = 90,435.20 : x
  2. Step 2: Convert to fraction form
    300,828.80/451,070.40 = 90,435.20/x
  3. Step 3: Cross multiply
    300,828.80x = 451,070.40 × 90,435.20
  4. Step 4: Simplify right side
    300,828.80x = 40,792,641,838.08
  5. Step 5: Solve for x
    x = 40,792,641,838.08/300,828.80
  6. Step 6: Final answer
    x = 135,600.85

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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.