Home / 512,986.78-769,518.85-153,129.21

Finding the Fourth Proportional to 512,986.78, 769,518.85 and 153,129.21

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Solution

The fourth proportional to 512,986.78, 769,518.85 and 153,129.21 is: 229,705.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,986.78 : 769,518.85 = 153,129.21 : x
  2. Step 2: Convert to fraction form
    512,986.78/769,518.85 = 153,129.21/x
  3. Step 3: Cross multiply
    512,986.78x = 769,518.85 × 153,129.21
  4. Step 4: Simplify right side
    512,986.78x = 117,835,813,580.61
  5. Step 5: Solve for x
    x = 117,835,813,580.61/512,986.78
  6. Step 6: Final answer
    x = 229,705.36

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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.