Home / 445,118.40-668,455.20-431,121.60

Finding the Fourth Proportional to 445,118.40, 668,455.20 and 431,121.60

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Solution

The fourth proportional to 445,118.40, 668,455.20 and 431,121.60 is: 647,435.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,118.40 : 668,455.20 = 431,121.60 : x
  2. Step 2: Convert to fraction form
    445,118.40/668,455.20 = 431,121.60/x
  3. Step 3: Cross multiply
    445,118.40x = 668,455.20 × 431,121.60
  4. Step 4: Simplify right side
    445,118.40x = 288,185,475,352.32
  5. Step 5: Solve for x
    x = 288,185,475,352.32/445,118.40
  6. Step 6: Final answer
    x = 647,435.55

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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.