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Finding the Fourth Proportional to 518,809.20, 776,464.20 and 455,823.60

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Solution

The fourth proportional to 518,809.20, 776,464.20 and 455,823.60 is: 682,198.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,809.20 : 776,464.20 = 455,823.60 : x
  2. Step 2: Convert to fraction form
    518,809.20/776,464.20 = 455,823.60/x
  3. Step 3: Cross multiply
    518,809.20x = 776,464.20 × 455,823.60
  4. Step 4: Simplify right side
    518,809.20x = 353,930,706,915.12
  5. Step 5: Solve for x
    x = 353,930,706,915.12/518,809.20
  6. Step 6: Final answer
    x = 682,198.21

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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.