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Finding the Fourth Proportional to 571,059.40, 855,769.90 and 420,121.80

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Solution

The fourth proportional to 571,059.40, 855,769.90 and 420,121.80 is: 629,580.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,059.40 : 855,769.90 = 420,121.80 : x
  2. Step 2: Convert to fraction form
    571,059.40/855,769.90 = 420,121.80/x
  3. Step 3: Cross multiply
    571,059.40x = 855,769.90 × 420,121.80
  4. Step 4: Simplify right side
    571,059.40x = 359,527,590,773.82
  5. Step 5: Solve for x
    x = 359,527,590,773.82/571,059.40
  6. Step 6: Final answer
    x = 629,580.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.