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Finding the Fourth Proportional to 500,327.80, 690,439.57 and 279,566.86

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Solution

The fourth proportional to 500,327.80, 690,439.57 and 279,566.86 is: 385,795.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,327.80 : 690,439.57 = 279,566.86 : x
  2. Step 2: Convert to fraction form
    500,327.80/690,439.57 = 279,566.86/x
  3. Step 3: Cross multiply
    500,327.80x = 690,439.57 × 279,566.86
  4. Step 4: Simplify right side
    500,327.80x = 193,024,022,604.65
  5. Step 5: Solve for x
    x = 193,024,022,604.65/500,327.80
  6. Step 6: Final answer
    x = 385,795.12

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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.