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Finding the Fourth Proportional to 627,205.22, 865,515.47 and 355,267.64

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Solution

The fourth proportional to 627,205.22, 865,515.47 and 355,267.64 is: 490,253.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,205.22 : 865,515.47 = 355,267.64 : x
  2. Step 2: Convert to fraction form
    627,205.22/865,515.47 = 355,267.64/x
  3. Step 3: Cross multiply
    627,205.22x = 865,515.47 × 355,267.64
  4. Step 4: Simplify right side
    627,205.22x = 307,489,638,797.84
  5. Step 5: Solve for x
    x = 307,489,638,797.84/627,205.22
  6. Step 6: Final answer
    x = 490,253.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.