Home / 426,005.20-639,007.80-356,021.20

Finding the Fourth Proportional to 426,005.20, 639,007.80 and 356,021.20

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Solution

The fourth proportional to 426,005.20, 639,007.80 and 356,021.20 is: 534,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,005.20 : 639,007.80 = 356,021.20 : x
  2. Step 2: Convert to fraction form
    426,005.20/639,007.80 = 356,021.20/x
  3. Step 3: Cross multiply
    426,005.20x = 639,007.80 × 356,021.20
  4. Step 4: Simplify right side
    426,005.20x = 227,500,323,765.36
  5. Step 5: Solve for x
    x = 227,500,323,765.36/426,005.20
  6. Step 6: Final answer
    x = 534,031.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.