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Finding the Fourth Proportional to 644,622.87, 889,607.25 and 358,142.96

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Solution

The fourth proportional to 644,622.87, 889,607.25 and 358,142.96 is: 494,252.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,622.87 : 889,607.25 = 358,142.96 : x
  2. Step 2: Convert to fraction form
    644,622.87/889,607.25 = 358,142.96/x
  3. Step 3: Cross multiply
    644,622.87x = 889,607.25 × 358,142.96
  4. Step 4: Simplify right side
    644,622.87x = 318,606,569,304.42
  5. Step 5: Solve for x
    x = 318,606,569,304.42/644,622.87
  6. Step 6: Final answer
    x = 494,252.66

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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.