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Finding the Fourth Proportional to 489,940.28, 676,150.94 and 272,173.80

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Solution

The fourth proportional to 489,940.28, 676,150.94 and 272,173.80 is: 375,618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,940.28 : 676,150.94 = 272,173.80 : x
  2. Step 2: Convert to fraction form
    489,940.28/676,150.94 = 272,173.80/x
  3. Step 3: Cross multiply
    489,940.28x = 676,150.94 × 272,173.80
  4. Step 4: Simplify right side
    489,940.28x = 184,030,573,929.37
  5. Step 5: Solve for x
    x = 184,030,573,929.37/489,940.28
  6. Step 6: Final answer
    x = 375,618.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.