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Finding the Fourth Proportional to 681,137.76, 938,988 and 476,554.80

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Solution

The fourth proportional to 681,137.76, 938,988 and 476,554.80 is: 656,958.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,137.76 : 938,988 = 476,554.80 : x
  2. Step 2: Convert to fraction form
    681,137.76/938,988 = 476,554.80/x
  3. Step 3: Cross multiply
    681,137.76x = 938,988 × 476,554.80
  4. Step 4: Simplify right side
    681,137.76x = 447,479,238,542.40
  5. Step 5: Solve for x
    x = 447,479,238,542.40/681,137.76
  6. Step 6: Final answer
    x = 656,958.50

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1.5x scale

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.