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Finding the Fourth Proportional to 380,728.40, 525,536.87 and 219,647.66

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Solution

The fourth proportional to 380,728.40, 525,536.87 and 219,647.66 is: 303,189.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,728.40 : 525,536.87 = 219,647.66 : x
  2. Step 2: Convert to fraction form
    380,728.40/525,536.87 = 219,647.66/x
  3. Step 3: Cross multiply
    380,728.40x = 525,536.87 × 219,647.66
  4. Step 4: Simplify right side
    380,728.40x = 115,432,940,013.30
  5. Step 5: Solve for x
    x = 115,432,940,013.30/380,728.40
  6. Step 6: Final answer
    x = 303,189.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.