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Finding the Fourth Proportional to 266,320.46, 399,481.74 and 66,640.28

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Solution

The fourth proportional to 266,320.46, 399,481.74 and 66,640.28 is: 99,960.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,320.46 : 399,481.74 = 66,640.28 : x
  2. Step 2: Convert to fraction form
    266,320.46/399,481.74 = 66,640.28/x
  3. Step 3: Cross multiply
    266,320.46x = 399,481.74 × 66,640.28
  4. Step 4: Simplify right side
    266,320.46x = 26,621,573,011.08
  5. Step 5: Solve for x
    x = 26,621,573,011.08/266,320.46
  6. Step 6: Final answer
    x = 99,960.67

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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.