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Finding the Fourth Proportional to 491,859.34, 738,003.60 and 172,240.60

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Solution

The fourth proportional to 491,859.34, 738,003.60 and 172,240.60 is: 258,436.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,859.34 : 738,003.60 = 172,240.60 : x
  2. Step 2: Convert to fraction form
    491,859.34/738,003.60 = 172,240.60/x
  3. Step 3: Cross multiply
    491,859.34x = 738,003.60 × 172,240.60
  4. Step 4: Simplify right side
    491,859.34x = 127,114,185,495.37
  5. Step 5: Solve for x
    x = 127,114,185,495.37/491,859.34
  6. Step 6: Final answer
    x = 258,436.05

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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.