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Finding the Fourth Proportional to 667,078.28, 920,561.58 and 361,146.84

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Solution

The fourth proportional to 667,078.28, 920,561.58 and 361,146.84 is: 498,379.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,078.28 : 920,561.58 = 361,146.84 : x
  2. Step 2: Convert to fraction form
    667,078.28/920,561.58 = 361,146.84/x
  3. Step 3: Cross multiply
    667,078.28x = 920,561.58 × 361,146.84
  4. Step 4: Simplify right side
    667,078.28x = 332,457,905,642.41
  5. Step 5: Solve for x
    x = 332,457,905,642.41/667,078.28
  6. Step 6: Final answer
    x = 498,379.15

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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.