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Finding the Fourth Proportional to 494,557.30, 739,867.65 and 428,728.60

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Solution

The fourth proportional to 494,557.30, 739,867.65 and 428,728.60 is: 641,386.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,557.30 : 739,867.65 = 428,728.60 : x
  2. Step 2: Convert to fraction form
    494,557.30/739,867.65 = 428,728.60/x
  3. Step 3: Cross multiply
    494,557.30x = 739,867.65 × 428,728.60
  4. Step 4: Simplify right side
    494,557.30x = 317,202,421,769.79
  5. Step 5: Solve for x
    x = 317,202,421,769.79/494,557.30
  6. Step 6: Final answer
    x = 641,386.59

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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.