Home / 426,128.20-639,192.30-268,534.60

Finding the Fourth Proportional to 426,128.20, 639,192.30 and 268,534.60

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Solution

The fourth proportional to 426,128.20, 639,192.30 and 268,534.60 is: 402,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,128.20 : 639,192.30 = 268,534.60 : x
  2. Step 2: Convert to fraction form
    426,128.20/639,192.30 = 268,534.60/x
  3. Step 3: Cross multiply
    426,128.20x = 639,192.30 × 268,534.60
  4. Step 4: Simplify right side
    426,128.20x = 171,645,248,603.58
  5. Step 5: Solve for x
    x = 171,645,248,603.58/426,128.20
  6. Step 6: Final answer
    x = 402,801.90

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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.