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Finding the Fourth Proportional to 500,059.85, 690,180.96 and 378,989.96

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Solution

The fourth proportional to 500,059.85, 690,180.96 and 378,989.96 is: 523,080.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,059.85 : 690,180.96 = 378,989.96 : x
  2. Step 2: Convert to fraction form
    500,059.85/690,180.96 = 378,989.96/x
  3. Step 3: Cross multiply
    500,059.85x = 690,180.96 × 378,989.96
  4. Step 4: Simplify right side
    500,059.85x = 261,571,654,423.16
  5. Step 5: Solve for x
    x = 261,571,654,423.16/500,059.85
  6. Step 6: Final answer
    x = 523,080.70

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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.