Home / 426,830.20-640,277.82-127,287.40

Finding the Fourth Proportional to 426,830.20, 640,277.82 and 127,287.40

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Solution

The fourth proportional to 426,830.20, 640,277.82 and 127,287.40 is: 190,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,830.20 : 640,277.82 = 127,287.40 : x
  2. Step 2: Convert to fraction form
    426,830.20/640,277.82 = 127,287.40/x
  3. Step 3: Cross multiply
    426,830.20x = 640,277.82 × 127,287.40
  4. Step 4: Simplify right side
    426,830.20x = 81,499,298,985.47
  5. Step 5: Solve for x
    x = 81,499,298,985.47/426,830.20
  6. Step 6: Final answer
    x = 190,940.80

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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.