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Finding the Fourth Proportional to 577,884.81, 797,426.74 and 391,236.60

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Solution

The fourth proportional to 577,884.81, 797,426.74 and 391,236.60 is: 539,869.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,884.81 : 797,426.74 = 391,236.60 : x
  2. Step 2: Convert to fraction form
    577,884.81/797,426.74 = 391,236.60/x
  3. Step 3: Cross multiply
    577,884.81x = 797,426.74 × 391,236.60
  4. Step 4: Simplify right side
    577,884.81x = 311,982,526,506.68
  5. Step 5: Solve for x
    x = 311,982,526,506.68/577,884.81
  6. Step 6: Final answer
    x = 539,869.75

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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.