Home / 685,137.40-1,026,328.29-385,168.48

Finding the Fourth Proportional to 685,137.40, 1,026,328.29 and 385,168.48

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Solution

The fourth proportional to 685,137.40, 1,026,328.29 and 385,168.48 is: 576,978.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,137.40 : 1,026,328.29 = 385,168.48 : x
  2. Step 2: Convert to fraction form
    685,137.40/1,026,328.29 = 385,168.48/x
  3. Step 3: Cross multiply
    685,137.40x = 1,026,328.29 × 385,168.48
  4. Step 4: Simplify right side
    685,137.40x = 395,309,307,440.30
  5. Step 5: Solve for x
    x = 395,309,307,440.30/685,137.40
  6. Step 6: Final answer
    x = 576,978.15

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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.