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Finding the Fourth Proportional to 352,073.80, 528,045.90 and 218,715.40

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Solution

The fourth proportional to 352,073.80, 528,045.90 and 218,715.40 is: 328,032.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,073.80 : 528,045.90 = 218,715.40 : x
  2. Step 2: Convert to fraction form
    352,073.80/528,045.90 = 218,715.40/x
  3. Step 3: Cross multiply
    352,073.80x = 528,045.90 × 218,715.40
  4. Step 4: Simplify right side
    352,073.80x = 115,491,770,236.86
  5. Step 5: Solve for x
    x = 115,491,770,236.86/352,073.80
  6. Step 6: Final answer
    x = 328,032.84

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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.