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Finding the Fourth Proportional to 500,081.45, 690,038.10 and 303,745.73

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Solution

The fourth proportional to 500,081.45, 690,038.10 and 303,745.73 is: 419,123.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,081.45 : 690,038.10 = 303,745.73 : x
  2. Step 2: Convert to fraction form
    500,081.45/690,038.10 = 303,745.73/x
  3. Step 3: Cross multiply
    500,081.45x = 690,038.10 × 303,745.73
  4. Step 4: Simplify right side
    500,081.45x = 209,596,122,962.12
  5. Step 5: Solve for x
    x = 209,596,122,962.12/500,081.45
  6. Step 6: Final answer
    x = 419,123.97

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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.