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Finding the Fourth Proportional to 494,559.30, 739,870.65 and 428,730.60

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Solution

The fourth proportional to 494,559.30, 739,870.65 and 428,730.60 is: 641,389.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,559.30 : 739,870.65 = 428,730.60 : x
  2. Step 2: Convert to fraction form
    494,559.30/739,870.65 = 428,730.60/x
  3. Step 3: Cross multiply
    494,559.30x = 739,870.65 × 428,730.60
  4. Step 4: Simplify right side
    494,559.30x = 317,205,187,696.89
  5. Step 5: Solve for x
    x = 317,205,187,696.89/494,559.30
  6. Step 6: Final answer
    x = 641,389.59

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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.