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Finding the Fourth Proportional to 449,633.17, 674,782.36 and 212,976.38

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Solution

The fourth proportional to 449,633.17, 674,782.36 and 212,976.38 is: 319,622.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,633.17 : 674,782.36 = 212,976.38 : x
  2. Step 2: Convert to fraction form
    449,633.17/674,782.36 = 212,976.38/x
  3. Step 3: Cross multiply
    449,633.17x = 674,782.36 × 212,976.38
  4. Step 4: Simplify right side
    449,633.17x = 143,712,705,475.17
  5. Step 5: Solve for x
    x = 143,712,705,475.17/449,633.17
  6. Step 6: Final answer
    x = 319,622.12

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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.