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Finding the Fourth Proportional to 311,455.55, 437,218.75 and 311,455.55

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Solution

The fourth proportional to 311,455.55, 437,218.75 and 311,455.55 is: 437,218.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,455.55 : 437,218.75 = 311,455.55 : x
  2. Step 2: Convert to fraction form
    311,455.55/437,218.75 = 311,455.55/x
  3. Step 3: Cross multiply
    311,455.55x = 437,218.75 × 311,455.55
  4. Step 4: Simplify right side
    311,455.55x = 136,174,206,251.56
  5. Step 5: Solve for x
    x = 136,174,206,251.56/311,455.55
  6. Step 6: Final answer
    x = 437,218.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.