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Finding the Fourth Proportional to 644,708.82, 889,682.01 and 358,229.64

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Solution

The fourth proportional to 644,708.82, 889,682.01 and 358,229.64 is: 494,347.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,708.82 : 889,682.01 = 358,229.64 : x
  2. Step 2: Convert to fraction form
    644,708.82/889,682.01 = 358,229.64/x
  3. Step 3: Cross multiply
    644,708.82x = 889,682.01 × 358,229.64
  4. Step 4: Simplify right side
    644,708.82x = 318,710,470,836.45
  5. Step 5: Solve for x
    x = 318,710,470,836.45/644,708.82
  6. Step 6: Final answer
    x = 494,347.93

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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.