Home / 685,137.90-1,026,329.01-385,168.98

Finding the Fourth Proportional to 685,137.90, 1,026,329.01 and 385,168.98

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Solution

The fourth proportional to 685,137.90, 1,026,329.01 and 385,168.98 is: 576,978.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,137.90 : 1,026,329.01 = 385,168.98 : x
  2. Step 2: Convert to fraction form
    685,137.90/1,026,329.01 = 385,168.98/x
  3. Step 3: Cross multiply
    685,137.90x = 1,026,329.01 × 385,168.98
  4. Step 4: Simplify right side
    685,137.90x = 395,310,097,926.11
  5. Step 5: Solve for x
    x = 395,310,097,926.11/685,137.90
  6. Step 6: Final answer
    x = 576,978.88

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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.