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Finding the Fourth Proportional to 389,290.67, 583,885.51 and 123,078.05

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Solution

The fourth proportional to 389,290.67, 583,885.51 and 123,078.05 is: 184,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,290.67 : 583,885.51 = 123,078.05 : x
  2. Step 2: Convert to fraction form
    389,290.67/583,885.51 = 123,078.05/x
  3. Step 3: Cross multiply
    389,290.67x = 583,885.51 × 123,078.05
  4. Step 4: Simplify right side
    389,290.67x = 71,863,486,766.93
  5. Step 5: Solve for x
    x = 71,863,486,766.93/389,290.67
  6. Step 6: Final answer
    x = 184,601.10

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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.