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Finding the Fourth Proportional to 615,105.20, 921,880.20 and 548,231.60

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Solution

The fourth proportional to 615,105.20, 921,880.20 and 548,231.60 is: 821,654.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,105.20 : 921,880.20 = 548,231.60 : x
  2. Step 2: Convert to fraction form
    615,105.20/921,880.20 = 548,231.60/x
  3. Step 3: Cross multiply
    615,105.20x = 921,880.20 × 548,231.60
  4. Step 4: Simplify right side
    615,105.20x = 505,403,857,054.32
  5. Step 5: Solve for x
    x = 505,403,857,054.32/615,105.20
  6. Step 6: Final answer
    x = 821,654.34

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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.