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Finding the Fourth Proportional to 874,902.78, 1,312,310.43 and 342,521.37

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Solution

The fourth proportional to 874,902.78, 1,312,310.43 and 342,521.37 is: 513,764.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,902.78 : 1,312,310.43 = 342,521.37 : x
  2. Step 2: Convert to fraction form
    874,902.78/1,312,310.43 = 342,521.37/x
  3. Step 3: Cross multiply
    874,902.78x = 1,312,310.43 × 342,521.37
  4. Step 4: Simplify right side
    874,902.78x = 449,494,366,348.89
  5. Step 5: Solve for x
    x = 449,494,366,348.89/874,902.78
  6. Step 6: Final answer
    x = 513,764.93

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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.