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Finding the Fourth Proportional to 388,457.26, 536,122.14 and 218,724.46

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Solution

The fourth proportional to 388,457.26, 536,122.14 and 218,724.46 is: 301,868.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,457.26 : 536,122.14 = 218,724.46 : x
  2. Step 2: Convert to fraction form
    388,457.26/536,122.14 = 218,724.46/x
  3. Step 3: Cross multiply
    388,457.26x = 536,122.14 × 218,724.46
  4. Step 4: Simplify right side
    388,457.26x = 117,263,025,565.54
  5. Step 5: Solve for x
    x = 117,263,025,565.54/388,457.26
  6. Step 6: Final answer
    x = 301,868.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.