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Finding the Fourth Proportional to 499,933.61, 689,190.69 and 356,444.54

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Solution

The fourth proportional to 499,933.61, 689,190.69 and 356,444.54 is: 491,381.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,933.61 : 689,190.69 = 356,444.54 : x
  2. Step 2: Convert to fraction form
    499,933.61/689,190.69 = 356,444.54/x
  3. Step 3: Cross multiply
    499,933.61x = 689,190.69 × 356,444.54
  4. Step 4: Simplify right side
    499,933.61x = 245,658,258,469.33
  5. Step 5: Solve for x
    x = 245,658,258,469.33/499,933.61
  6. Step 6: Final answer
    x = 491,381.76

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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.