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Finding the Fourth Proportional to 266,470.68, 399,768.94 and 86,555.56

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Solution

The fourth proportional to 266,470.68, 399,768.94 and 86,555.56 is: 129,853.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,470.68 : 399,768.94 = 86,555.56 : x
  2. Step 2: Convert to fraction form
    266,470.68/399,768.94 = 86,555.56/x
  3. Step 3: Cross multiply
    266,470.68x = 399,768.94 × 86,555.56
  4. Step 4: Simplify right side
    266,470.68x = 34,602,224,472.31
  5. Step 5: Solve for x
    x = 34,602,224,472.31/266,470.68
  6. Step 6: Final answer
    x = 129,853.78

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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.