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Finding the Fourth Proportional to 388,388.51, 582,722.59 and 135,706.17

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Solution

The fourth proportional to 388,388.51, 582,722.59 and 135,706.17 is: 203,608.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,388.51 : 582,722.59 = 135,706.17 : x
  2. Step 2: Convert to fraction form
    388,388.51/582,722.59 = 135,706.17/x
  3. Step 3: Cross multiply
    388,388.51x = 582,722.59 × 135,706.17
  4. Step 4: Simplify right side
    388,388.51x = 79,079,050,861.38
  5. Step 5: Solve for x
    x = 79,079,050,861.38/388,388.51
  6. Step 6: Final answer
    x = 203,608.11

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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.