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Finding the Fourth Proportional to 644,273.78, 889,073.45 and 357,812.31

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Solution

The fourth proportional to 644,273.78, 889,073.45 and 357,812.31 is: 493,767.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,273.78 : 889,073.45 = 357,812.31 : x
  2. Step 2: Convert to fraction form
    644,273.78/889,073.45 = 357,812.31/x
  3. Step 3: Cross multiply
    644,273.78x = 889,073.45 × 357,812.31
  4. Step 4: Simplify right side
    644,273.78x = 318,121,430,457.82
  5. Step 5: Solve for x
    x = 318,121,430,457.82/644,273.78
  6. Step 6: Final answer
    x = 493,767.47

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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.