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Finding the Fourth Proportional to 405,486.03, 608,165.15 and 135,612.12

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Solution

The fourth proportional to 405,486.03, 608,165.15 and 135,612.12 is: 203,396.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,486.03 : 608,165.15 = 135,612.12 : x
  2. Step 2: Convert to fraction form
    405,486.03/608,165.15 = 135,612.12/x
  3. Step 3: Cross multiply
    405,486.03x = 608,165.15 × 135,612.12
  4. Step 4: Simplify right side
    405,486.03x = 82,474,565,301.62
  5. Step 5: Solve for x
    x = 82,474,565,301.62/405,486.03
  6. Step 6: Final answer
    x = 203,396.81

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1.5x scale

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.