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Finding the Fourth Proportional to 647,086.12, 892,971.58 and 352,729.39

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Solution

The fourth proportional to 647,086.12, 892,971.58 and 352,729.39 is: 486,762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,086.12 : 892,971.58 = 352,729.39 : x
  2. Step 2: Convert to fraction form
    647,086.12/892,971.58 = 352,729.39/x
  3. Step 3: Cross multiply
    647,086.12x = 892,971.58 × 352,729.39
  4. Step 4: Simplify right side
    647,086.12x = 314,977,319,922.17
  5. Step 5: Solve for x
    x = 314,977,319,922.17/647,086.12
  6. Step 6: Final answer
    x = 486,762.59

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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.