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Finding the Fourth Proportional to 639,391.40, 882,297.30 and 352,893.08

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Solution

The fourth proportional to 639,391.40, 882,297.30 and 352,893.08 is: 486,957.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,391.40 : 882,297.30 = 352,893.08 : x
  2. Step 2: Convert to fraction form
    639,391.40/882,297.30 = 352,893.08/x
  3. Step 3: Cross multiply
    639,391.40x = 882,297.30 × 352,893.08
  4. Step 4: Simplify right side
    639,391.40x = 311,356,611,672.68
  5. Step 5: Solve for x
    x = 311,356,611,672.68/639,391.40
  6. Step 6: Final answer
    x = 486,957.77

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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.