Home / 776,786.64-1,165,243.20-215,821.20

Finding the Fourth Proportional to 776,786.64, 1,165,243.20 and 215,821.20

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Solution

The fourth proportional to 776,786.64, 1,165,243.20 and 215,821.20 is: 323,749.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    776,786.64 : 1,165,243.20 = 215,821.20 : x
  2. Step 2: Convert to fraction form
    776,786.64/1,165,243.20 = 215,821.20/x
  3. Step 3: Cross multiply
    776,786.64x = 1,165,243.20 × 215,821.20
  4. Step 4: Simplify right side
    776,786.64x = 251,484,185,715.84
  5. Step 5: Solve for x
    x = 251,484,185,715.84/776,786.64
  6. Step 6: Final answer
    x = 323,749.37

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1.5x scale

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.