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Finding the Fourth Proportional to 664,441.37, 916,820.94 and 392,471.52

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Solution

The fourth proportional to 664,441.37, 916,820.94 and 392,471.52 is: 541,546.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,441.37 : 916,820.94 = 392,471.52 : x
  2. Step 2: Convert to fraction form
    664,441.37/916,820.94 = 392,471.52/x
  3. Step 3: Cross multiply
    664,441.37x = 916,820.94 × 392,471.52
  4. Step 4: Simplify right side
    664,441.37x = 359,826,107,889.63
  5. Step 5: Solve for x
    x = 359,826,107,889.63/664,441.37
  6. Step 6: Final answer
    x = 541,546.82

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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.