Home / 705,128.98-1,055,354.55-642,094.78

Finding the Fourth Proportional to 705,128.98, 1,055,354.55 and 642,094.78

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Solution

The fourth proportional to 705,128.98, 1,055,354.55 and 642,094.78 is: 961,012.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,128.98 : 1,055,354.55 = 642,094.78 : x
  2. Step 2: Convert to fraction form
    705,128.98/1,055,354.55 = 642,094.78/x
  3. Step 3: Cross multiply
    705,128.98x = 1,055,354.55 × 642,094.78
  4. Step 4: Simplify right side
    705,128.98x = 677,637,647,604.25
  5. Step 5: Solve for x
    x = 677,637,647,604.25/705,128.98
  6. Step 6: Final answer
    x = 961,012.34

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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.