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Finding the Fourth Proportional to 644,239.76, 889,887.48 and 490,343

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Solution

The fourth proportional to 644,239.76, 889,887.48 and 490,343 is: 677,310.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,239.76 : 889,887.48 = 490,343 : x
  2. Step 2: Convert to fraction form
    644,239.76/889,887.48 = 490,343/x
  3. Step 3: Cross multiply
    644,239.76x = 889,887.48 × 490,343
  4. Step 4: Simplify right side
    644,239.76x = 436,350,096,605.64
  5. Step 5: Solve for x
    x = 436,350,096,605.64/644,239.76
  6. Step 6: Final answer
    x = 677,310.10

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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.