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Finding the Fourth Proportional to 667,086.64, 920,562.54 and 372,738.76

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Solution

The fourth proportional to 667,086.64, 920,562.54 and 372,738.76 is: 514,369.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,086.64 : 920,562.54 = 372,738.76 : x
  2. Step 2: Convert to fraction form
    667,086.64/920,562.54 = 372,738.76/x
  3. Step 3: Cross multiply
    667,086.64x = 920,562.54 × 372,738.76
  4. Step 4: Simplify right side
    667,086.64x = 343,129,339,662.05
  5. Step 5: Solve for x
    x = 343,129,339,662.05/667,086.64
  6. Step 6: Final answer
    x = 514,369.98

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Double scale
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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.