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Finding the Fourth Proportional to 644,640.73, 889,597.79 and 358,154.66

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Solution

The fourth proportional to 644,640.73, 889,597.79 and 358,154.66 is: 494,249.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,640.73 : 889,597.79 = 358,154.66 : x
  2. Step 2: Convert to fraction form
    644,640.73/889,597.79 = 358,154.66/x
  3. Step 3: Cross multiply
    644,640.73x = 889,597.79 × 358,154.66
  4. Step 4: Simplify right side
    644,640.73x = 318,613,595,790.50
  5. Step 5: Solve for x
    x = 318,613,595,790.50/644,640.73
  6. Step 6: Final answer
    x = 494,249.87

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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.