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Finding the Fourth Proportional to 403,935.80, 605,903.70 and 119,636.60

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Solution

The fourth proportional to 403,935.80, 605,903.70 and 119,636.60 is: 179,454.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,935.80 : 605,903.70 = 119,636.60 : x
  2. Step 2: Convert to fraction form
    403,935.80/605,903.70 = 119,636.60/x
  3. Step 3: Cross multiply
    403,935.80x = 605,903.70 × 119,636.60
  4. Step 4: Simplify right side
    403,935.80x = 72,488,258,595.42
  5. Step 5: Solve for x
    x = 72,488,258,595.42/403,935.80
  6. Step 6: Final answer
    x = 179,454.90

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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.