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Finding the Fourth Proportional to 667,439.58, 920,812.38 and 493,427.62

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Solution

The fourth proportional to 667,439.58, 920,812.38 and 493,427.62 is: 680,742.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,439.58 : 920,812.38 = 493,427.62 : x
  2. Step 2: Convert to fraction form
    667,439.58/920,812.38 = 493,427.62/x
  3. Step 3: Cross multiply
    667,439.58x = 920,812.38 × 493,427.62
  4. Step 4: Simplify right side
    667,439.58x = 454,354,261,129.94
  5. Step 5: Solve for x
    x = 454,354,261,129.94/667,439.58
  6. Step 6: Final answer
    x = 680,742.16

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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.