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Finding the Fourth Proportional to 644,914.24, 889,914 and 358,388.08

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Solution

The fourth proportional to 644,914.24, 889,914 and 358,388.08 is: 494,537.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,914.24 : 889,914 = 358,388.08 : x
  2. Step 2: Convert to fraction form
    644,914.24/889,914 = 358,388.08/x
  3. Step 3: Cross multiply
    644,914.24x = 889,914 × 358,388.08
  4. Step 4: Simplify right side
    644,914.24x = 318,934,569,825.12
  5. Step 5: Solve for x
    x = 318,934,569,825.12/644,914.24
  6. Step 6: Final answer
    x = 494,537.96

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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.