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Finding the Fourth Proportional to 500,518.50, 690,715.89 and 274,164.90

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Solution

The fourth proportional to 500,518.50, 690,715.89 and 274,164.90 is: 378,347.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,518.50 : 690,715.89 = 274,164.90 : x
  2. Step 2: Convert to fraction form
    500,518.50/690,715.89 = 274,164.90/x
  3. Step 3: Cross multiply
    500,518.50x = 690,715.89 × 274,164.90
  4. Step 4: Simplify right side
    500,518.50x = 189,370,052,910.26
  5. Step 5: Solve for x
    x = 189,370,052,910.26/500,518.50
  6. Step 6: Final answer
    x = 378,347.76

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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.