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Finding the Fourth Proportional to 644,367.92, 889,203 and 357,906.28

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Solution

The fourth proportional to 644,367.92, 889,203 and 357,906.28 is: 493,896.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,367.92 : 889,203 = 357,906.28 : x
  2. Step 2: Convert to fraction form
    644,367.92/889,203 = 357,906.28/x
  3. Step 3: Cross multiply
    644,367.92x = 889,203 × 357,906.28
  4. Step 4: Simplify right side
    644,367.92x = 318,251,337,894.84
  5. Step 5: Solve for x
    x = 318,251,337,894.84/644,367.92
  6. Step 6: Final answer
    x = 493,896.93

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1.5x scale

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.