Home / 499,913.22-689,863.09-285,122.49

Finding the Fourth Proportional to 499,913.22, 689,863.09 and 285,122.49

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Solution

The fourth proportional to 499,913.22, 689,863.09 and 285,122.49 is: 393,459.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,913.22 : 689,863.09 = 285,122.49 : x
  2. Step 2: Convert to fraction form
    499,913.22/689,863.09 = 285,122.49/x
  3. Step 3: Cross multiply
    499,913.22x = 689,863.09 × 285,122.49
  4. Step 4: Simplify right side
    499,913.22x = 196,695,481,979.89
  5. Step 5: Solve for x
    x = 196,695,481,979.89/499,913.22
  6. Step 6: Final answer
    x = 393,459.25

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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.