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Finding the Fourth Proportional to 615,145.20, 921,940.20 and 548,271.60

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Solution

The fourth proportional to 615,145.20, 921,940.20 and 548,271.60 is: 821,714.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,145.20 : 921,940.20 = 548,271.60 : x
  2. Step 2: Convert to fraction form
    615,145.20/921,940.20 = 548,271.60/x
  3. Step 3: Cross multiply
    615,145.20x = 921,940.20 × 548,271.60
  4. Step 4: Simplify right side
    615,145.20x = 505,473,628,558.32
  5. Step 5: Solve for x
    x = 505,473,628,558.32/615,145.20
  6. Step 6: Final answer
    x = 821,714.33

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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.