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Finding the Fourth Proportional to 220,577.40, 330,866.10 and 115,428.60

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Solution

The fourth proportional to 220,577.40, 330,866.10 and 115,428.60 is: 173,142.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,577.40 : 330,866.10 = 115,428.60 : x
  2. Step 2: Convert to fraction form
    220,577.40/330,866.10 = 115,428.60/x
  3. Step 3: Cross multiply
    220,577.40x = 330,866.10 × 115,428.60
  4. Step 4: Simplify right side
    220,577.40x = 38,191,410,710.46
  5. Step 5: Solve for x
    x = 38,191,410,710.46/220,577.40
  6. Step 6: Final answer
    x = 173,142.90

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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.