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Finding the Fourth Proportional to 500,385.36, 690,530.82 and 270,942.90

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Solution

The fourth proportional to 500,385.36, 690,530.82 and 270,942.90 is: 373,900.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,385.36 : 690,530.82 = 270,942.90 : x
  2. Step 2: Convert to fraction form
    500,385.36/690,530.82 = 270,942.90/x
  3. Step 3: Cross multiply
    500,385.36x = 690,530.82 × 270,942.90
  4. Step 4: Simplify right side
    500,385.36x = 187,094,422,910.18
  5. Step 5: Solve for x
    x = 187,094,422,910.18/500,385.36
  6. Step 6: Final answer
    x = 373,900.67

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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.