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Finding the Fourth Proportional to 272,611.60, 408,917.40 and 260,364.40

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Solution

The fourth proportional to 272,611.60, 408,917.40 and 260,364.40 is: 390,546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,611.60 : 408,917.40 = 260,364.40 : x
  2. Step 2: Convert to fraction form
    272,611.60/408,917.40 = 260,364.40/x
  3. Step 3: Cross multiply
    272,611.60x = 408,917.40 × 260,364.40
  4. Step 4: Simplify right side
    272,611.60x = 106,467,533,500.56
  5. Step 5: Solve for x
    x = 106,467,533,500.56/272,611.60
  6. Step 6: Final answer
    x = 390,546.60

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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.