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Finding the Fourth Proportional to 386,060.80, 578,937.60 and 136,614.40

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Solution

The fourth proportional to 386,060.80, 578,937.60 and 136,614.40 is: 204,867.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,060.80 : 578,937.60 = 136,614.40 : x
  2. Step 2: Convert to fraction form
    386,060.80/578,937.60 = 136,614.40/x
  3. Step 3: Cross multiply
    386,060.80x = 578,937.60 × 136,614.40
  4. Step 4: Simplify right side
    386,060.80x = 79,091,212,861.44
  5. Step 5: Solve for x
    x = 79,091,212,861.44/386,060.80
  6. Step 6: Final answer
    x = 204,867.25

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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.