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Finding the Fourth Proportional to 388,313.50, 581,628.93 and 188,215.29

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Solution

The fourth proportional to 388,313.50, 581,628.93 and 188,215.29 is: 281,915.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,313.50 : 581,628.93 = 188,215.29 : x
  2. Step 2: Convert to fraction form
    388,313.50/581,628.93 = 188,215.29/x
  3. Step 3: Cross multiply
    388,313.50x = 581,628.93 × 188,215.29
  4. Step 4: Simplify right side
    388,313.50x = 109,471,457,732.34
  5. Step 5: Solve for x
    x = 109,471,457,732.34/388,313.50
  6. Step 6: Final answer
    x = 281,915.15

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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.