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Finding the Fourth Proportional to 667,440.59, 920,813.76 and 493,428.62

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Solution

The fourth proportional to 667,440.59, 920,813.76 and 493,428.62 is: 680,743.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,440.59 : 920,813.76 = 493,428.62 : x
  2. Step 2: Convert to fraction form
    667,440.59/920,813.76 = 493,428.62/x
  3. Step 3: Cross multiply
    667,440.59x = 920,813.76 × 493,428.62
  4. Step 4: Simplify right side
    667,440.59x = 454,355,865,175.85
  5. Step 5: Solve for x
    x = 454,355,865,175.85/667,440.59
  6. Step 6: Final answer
    x = 680,743.54

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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.