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Finding the Fourth Proportional to 644,949.48, 889,991.94 and 358,459.68

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Solution

The fourth proportional to 644,949.48, 889,991.94 and 358,459.68 is: 494,653.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,949.48 : 889,991.94 = 358,459.68 : x
  2. Step 2: Convert to fraction form
    644,949.48/889,991.94 = 358,459.68/x
  3. Step 3: Cross multiply
    644,949.48x = 889,991.94 × 358,459.68
  4. Step 4: Simplify right side
    644,949.48x = 319,026,226,014.98
  5. Step 5: Solve for x
    x = 319,026,226,014.98/644,949.48
  6. Step 6: Final answer
    x = 494,653.05

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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.