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Finding the Fourth Proportional to 403,675.80, 605,513.70 and 193,205.40

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Solution

The fourth proportional to 403,675.80, 605,513.70 and 193,205.40 is: 289,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,675.80 : 605,513.70 = 193,205.40 : x
  2. Step 2: Convert to fraction form
    403,675.80/605,513.70 = 193,205.40/x
  3. Step 3: Cross multiply
    403,675.80x = 605,513.70 × 193,205.40
  4. Step 4: Simplify right side
    403,675.80x = 116,988,516,613.98
  5. Step 5: Solve for x
    x = 116,988,516,613.98/403,675.80
  6. Step 6: Final answer
    x = 289,808.10

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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.