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Finding the Fourth Proportional to 500,311.83, 690,430.55 and 270,869.12

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Solution

The fourth proportional to 500,311.83, 690,430.55 and 270,869.12 is: 373,799.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,311.83 : 690,430.55 = 270,869.12 : x
  2. Step 2: Convert to fraction form
    500,311.83/690,430.55 = 270,869.12/x
  3. Step 3: Cross multiply
    500,311.83x = 690,430.55 × 270,869.12
  4. Step 4: Simplify right side
    500,311.83x = 187,016,315,499.62
  5. Step 5: Solve for x
    x = 187,016,315,499.62/500,311.83
  6. Step 6: Final answer
    x = 373,799.51

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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.