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Finding the Fourth Proportional to 615,272.40, 922,908.60 and 405,147.60

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Solution

The fourth proportional to 615,272.40, 922,908.60 and 405,147.60 is: 607,721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,272.40 : 922,908.60 = 405,147.60 : x
  2. Step 2: Convert to fraction form
    615,272.40/922,908.60 = 405,147.60/x
  3. Step 3: Cross multiply
    615,272.40x = 922,908.60 × 405,147.60
  4. Step 4: Simplify right side
    615,272.40x = 373,914,204,309.36
  5. Step 5: Solve for x
    x = 373,914,204,309.36/615,272.40
  6. Step 6: Final answer
    x = 607,721.40

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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.