Home / 1,187,258.72-1,780,221.84-512,919.20

Finding the Fourth Proportional to 1,187,258.72, 1,780,221.84 and 512,919.20

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Solution

The fourth proportional to 1,187,258.72, 1,780,221.84 and 512,919.20 is: 769,090.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,258.72 : 1,780,221.84 = 512,919.20 : x
  2. Step 2: Convert to fraction form
    1,187,258.72/1,780,221.84 = 512,919.20/x
  3. Step 3: Cross multiply
    1,187,258.72x = 1,780,221.84 × 512,919.20
  4. Step 4: Simplify right side
    1,187,258.72x = 913,109,961,995.33
  5. Step 5: Solve for x
    x = 913,109,961,995.33/1,187,258.72
  6. Step 6: Final answer
    x = 769,090.97

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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.