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Finding the Fourth Proportional to 407,625.60, 612,021.60 and 289,819.20

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Solution

The fourth proportional to 407,625.60, 612,021.60 and 289,819.20 is: 435,143.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,625.60 : 612,021.60 = 289,819.20 : x
  2. Step 2: Convert to fraction form
    407,625.60/612,021.60 = 289,819.20/x
  3. Step 3: Cross multiply
    407,625.60x = 612,021.60 × 289,819.20
  4. Step 4: Simplify right side
    407,625.60x = 177,375,610,494.72
  5. Step 5: Solve for x
    x = 177,375,610,494.72/407,625.60
  6. Step 6: Final answer
    x = 435,143.45

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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.