Home / 426,825.48-639,729.54-198,815.16

Finding the Fourth Proportional to 426,825.48, 639,729.54 and 198,815.16

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Solution

The fourth proportional to 426,825.48, 639,729.54 and 198,815.16 is: 297,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,825.48 : 639,729.54 = 198,815.16 : x
  2. Step 2: Convert to fraction form
    426,825.48/639,729.54 = 198,815.16/x
  3. Step 3: Cross multiply
    426,825.48x = 639,729.54 × 198,815.16
  4. Step 4: Simplify right side
    426,825.48x = 127,187,930,851.83
  5. Step 5: Solve for x
    x = 127,187,930,851.83/426,825.48
  6. Step 6: Final answer
    x = 297,985.80

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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.