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Finding the Fourth Proportional to 426,820.88, 640,403.44 and 190,001.60

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Solution

The fourth proportional to 426,820.88, 640,403.44 and 190,001.60 is: 285,079.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,820.88 : 640,403.44 = 190,001.60 : x
  2. Step 2: Convert to fraction form
    426,820.88/640,403.44 = 190,001.60/x
  3. Step 3: Cross multiply
    426,820.88x = 640,403.44 × 190,001.60
  4. Step 4: Simplify right side
    426,820.88x = 121,677,678,245.50
  5. Step 5: Solve for x
    x = 121,677,678,245.50/426,820.88
  6. Step 6: Final answer
    x = 285,079.02

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1.5x scale

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.