Home / 685,905.90-1,028,858.85-672,783.90

Finding the Fourth Proportional to 685,905.90, 1,028,858.85 and 672,783.90

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Solution

The fourth proportional to 685,905.90, 1,028,858.85 and 672,783.90 is: 1,009,175.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,905.90 : 1,028,858.85 = 672,783.90 : x
  2. Step 2: Convert to fraction form
    685,905.90/1,028,858.85 = 672,783.90/x
  3. Step 3: Cross multiply
    685,905.90x = 1,028,858.85 × 672,783.90
  4. Step 4: Simplify right side
    685,905.90x = 692,199,669,652.52
  5. Step 5: Solve for x
    x = 692,199,669,652.52/685,905.90
  6. Step 6: Final answer
    x = 1,009,175.85

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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.