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Finding the Fourth Proportional to 352,576, 528,864 and 89,920

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Solution

The fourth proportional to 352,576, 528,864 and 89,920 is: 134,880

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,576 : 528,864 = 89,920 : x
  2. Step 2: Convert to fraction form
    352,576/528,864 = 89,920/x
  3. Step 3: Cross multiply
    352,576x = 528,864 × 89,920
  4. Step 4: Simplify right side
    352,576x = 47,555,450,880
  5. Step 5: Solve for x
    x = 47,555,450,880/352,576
  6. Step 6: Final answer
    x = 134,880

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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.