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Finding the Fourth Proportional to 272,905.20, 408,920.40 and 172,886.40

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Solution

The fourth proportional to 272,905.20, 408,920.40 and 172,886.40 is: 259,052.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,905.20 : 408,920.40 = 172,886.40 : x
  2. Step 2: Convert to fraction form
    272,905.20/408,920.40 = 172,886.40/x
  3. Step 3: Cross multiply
    272,905.20x = 408,920.40 × 172,886.40
  4. Step 4: Simplify right side
    272,905.20x = 70,696,775,842.56
  5. Step 5: Solve for x
    x = 70,696,775,842.56/272,905.20
  6. Step 6: Final answer
    x = 259,052.51

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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.