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Finding the Fourth Proportional to 638,131.40, 880,609.93 and 347,745.49

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Solution

The fourth proportional to 638,131.40, 880,609.93 and 347,745.49 is: 479,882.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,131.40 : 880,609.93 = 347,745.49 : x
  2. Step 2: Convert to fraction form
    638,131.40/880,609.93 = 347,745.49/x
  3. Step 3: Cross multiply
    638,131.40x = 880,609.93 × 347,745.49
  4. Step 4: Simplify right side
    638,131.40x = 306,228,128,535.83
  5. Step 5: Solve for x
    x = 306,228,128,535.83/638,131.40
  6. Step 6: Final answer
    x = 479,882.56

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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.