Home / 429,619.40-644,234.70-192,840.20

Finding the Fourth Proportional to 429,619.40, 644,234.70 and 192,840.20

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Solution

The fourth proportional to 429,619.40, 644,234.70 and 192,840.20 is: 289,173.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,619.40 : 644,234.70 = 192,840.20 : x
  2. Step 2: Convert to fraction form
    429,619.40/644,234.70 = 192,840.20/x
  3. Step 3: Cross multiply
    429,619.40x = 644,234.70 × 192,840.20
  4. Step 4: Simplify right side
    429,619.40x = 124,234,348,394.94
  5. Step 5: Solve for x
    x = 124,234,348,394.94/429,619.40
  6. Step 6: Final answer
    x = 289,173.04

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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.