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Finding the Fourth Proportional to 30,680.80, 45,985.20 and 30,352.48

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Solution

The fourth proportional to 30,680.80, 45,985.20 and 30,352.48 is: 45,493.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,680.80 : 45,985.20 = 30,352.48 : x
  2. Step 2: Convert to fraction form
    30,680.80/45,985.20 = 30,352.48/x
  3. Step 3: Cross multiply
    30,680.80x = 45,985.20 × 30,352.48
  4. Step 4: Simplify right side
    30,680.80x = 1,395,764,863.30
  5. Step 5: Solve for x
    x = 1,395,764,863.30/30,680.80
  6. Step 6: Final answer
    x = 45,493.11

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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.