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Finding the Fourth Proportional to 485,276.80, 727,785.60 and 148,316.80

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Solution

The fourth proportional to 485,276.80, 727,785.60 and 148,316.80 is: 222,435.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,276.80 : 727,785.60 = 148,316.80 : x
  2. Step 2: Convert to fraction form
    485,276.80/727,785.60 = 148,316.80/x
  3. Step 3: Cross multiply
    485,276.80x = 727,785.60 × 148,316.80
  4. Step 4: Simplify right side
    485,276.80x = 107,942,831,278.08
  5. Step 5: Solve for x
    x = 107,942,831,278.08/485,276.80
  6. Step 6: Final answer
    x = 222,435.59

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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.