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Finding the Fourth Proportional to 238,338.40, 357,410.40 and 80,485.60

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Solution

The fourth proportional to 238,338.40, 357,410.40 and 80,485.60 is: 120,695.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,338.40 : 357,410.40 = 80,485.60 : x
  2. Step 2: Convert to fraction form
    238,338.40/357,410.40 = 80,485.60/x
  3. Step 3: Cross multiply
    238,338.40x = 357,410.40 × 80,485.60
  4. Step 4: Simplify right side
    238,338.40x = 28,766,390,490.24
  5. Step 5: Solve for x
    x = 28,766,390,490.24/238,338.40
  6. Step 6: Final answer
    x = 120,695.58

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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.