Home / 691,907.40-1,038,006.90-218,640.60

Finding the Fourth Proportional to 691,907.40, 1,038,006.90 and 218,640.60

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Solution

The fourth proportional to 691,907.40, 1,038,006.90 and 218,640.60 is: 328,006.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,907.40 : 1,038,006.90 = 218,640.60 : x
  2. Step 2: Convert to fraction form
    691,907.40/1,038,006.90 = 218,640.60/x
  3. Step 3: Cross multiply
    691,907.40x = 1,038,006.90 × 218,640.60
  4. Step 4: Simplify right side
    691,907.40x = 226,950,451,420.14
  5. Step 5: Solve for x
    x = 226,950,451,420.14/691,907.40
  6. Step 6: Final answer
    x = 328,006.97

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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.