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Finding the Fourth Proportional to 712,138.20, 982,773.96 and 389,848.32

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Solution

The fourth proportional to 712,138.20, 982,773.96 and 389,848.32 is: 538,003.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,138.20 : 982,773.96 = 389,848.32 : x
  2. Step 2: Convert to fraction form
    712,138.20/982,773.96 = 389,848.32/x
  3. Step 3: Cross multiply
    712,138.20x = 982,773.96 × 389,848.32
  4. Step 4: Simplify right side
    712,138.20x = 383,132,777,245.75
  5. Step 5: Solve for x
    x = 383,132,777,245.75/712,138.20
  6. Step 6: Final answer
    x = 538,003.41

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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.