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Finding the Fourth Proportional to 615,854.09, 850,253.81 and 422,579.31

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Solution

The fourth proportional to 615,854.09, 850,253.81 and 422,579.31 is: 583,416.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,854.09 : 850,253.81 = 422,579.31 : x
  2. Step 2: Convert to fraction form
    615,854.09/850,253.81 = 422,579.31/x
  3. Step 3: Cross multiply
    615,854.09x = 850,253.81 × 422,579.31
  4. Step 4: Simplify right side
    615,854.09x = 359,299,666,241.78
  5. Step 5: Solve for x
    x = 359,299,666,241.78/615,854.09
  6. Step 6: Final answer
    x = 583,416.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.