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Finding the Fourth Proportional to 647,792.91, 893,955.42 and 361,331.55

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Solution

The fourth proportional to 647,792.91, 893,955.42 and 361,331.55 is: 498,638.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,792.91 : 893,955.42 = 361,331.55 : x
  2. Step 2: Convert to fraction form
    647,792.91/893,955.42 = 361,331.55/x
  3. Step 3: Cross multiply
    647,792.91x = 893,955.42 × 361,331.55
  4. Step 4: Simplify right side
    647,792.91x = 323,014,297,539.50
  5. Step 5: Solve for x
    x = 323,014,297,539.50/647,792.91
  6. Step 6: Final answer
    x = 498,638.21

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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.