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Finding the Fourth Proportional to 365,705.57, 548,446.53 and 128,992.89

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Solution

The fourth proportional to 365,705.57, 548,446.53 and 128,992.89 is: 193,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,705.57 : 548,446.53 = 128,992.89 : x
  2. Step 2: Convert to fraction form
    365,705.57/548,446.53 = 128,992.89/x
  3. Step 3: Cross multiply
    365,705.57x = 548,446.53 × 128,992.89
  4. Step 4: Simplify right side
    365,705.57x = 70,745,702,915.17
  5. Step 5: Solve for x
    x = 70,745,702,915.17/365,705.57
  6. Step 6: Final answer
    x = 193,449.89

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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.