Home / 423,091.20-634,636.80-255,129.60

Finding the Fourth Proportional to 423,091.20, 634,636.80 and 255,129.60

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Solution

The fourth proportional to 423,091.20, 634,636.80 and 255,129.60 is: 382,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,091.20 : 634,636.80 = 255,129.60 : x
  2. Step 2: Convert to fraction form
    423,091.20/634,636.80 = 255,129.60/x
  3. Step 3: Cross multiply
    423,091.20x = 634,636.80 × 255,129.60
  4. Step 4: Simplify right side
    423,091.20x = 161,914,632,929.28
  5. Step 5: Solve for x
    x = 161,914,632,929.28/423,091.20
  6. Step 6: Final answer
    x = 382,694.40

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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.