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Finding the Fourth Proportional to 389,627.55, 584,459.55 and 123,408.90

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Solution

The fourth proportional to 389,627.55, 584,459.55 and 123,408.90 is: 185,119.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,627.55 : 584,459.55 = 123,408.90 : x
  2. Step 2: Convert to fraction form
    389,627.55/584,459.55 = 123,408.90/x
  3. Step 3: Cross multiply
    389,627.55x = 584,459.55 × 123,408.90
  4. Step 4: Simplify right side
    389,627.55x = 72,127,510,160.00
  5. Step 5: Solve for x
    x = 72,127,510,160.00/389,627.55
  6. Step 6: Final answer
    x = 185,119.12

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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.