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Finding the Fourth Proportional to 393,647.55, 590,565.03 and 127,408.04

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Solution

The fourth proportional to 393,647.55, 590,565.03 and 127,408.04 is: 191,142.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,647.55 : 590,565.03 = 127,408.04 : x
  2. Step 2: Convert to fraction form
    393,647.55/590,565.03 = 127,408.04/x
  3. Step 3: Cross multiply
    393,647.55x = 590,565.03 × 127,408.04
  4. Step 4: Simplify right side
    393,647.55x = 75,242,731,748.85
  5. Step 5: Solve for x
    x = 75,242,731,748.85/393,647.55
  6. Step 6: Final answer
    x = 191,142.39

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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.