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Finding the Fourth Proportional to 538,740.96, 743,605.78 and 318,171.48

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Solution

The fourth proportional to 538,740.96, 743,605.78 and 318,171.48 is: 439,161.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,740.96 : 743,605.78 = 318,171.48 : x
  2. Step 2: Convert to fraction form
    538,740.96/743,605.78 = 318,171.48/x
  3. Step 3: Cross multiply
    538,740.96x = 743,605.78 × 318,171.48
  4. Step 4: Simplify right side
    538,740.96x = 236,594,151,559.15
  5. Step 5: Solve for x
    x = 236,594,151,559.15/538,740.96
  6. Step 6: Final answer
    x = 439,161.25

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1.5x scale

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.