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Finding the Fourth Proportional to 528,828.52, 729,763.42 and 287,105.86

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Solution

The fourth proportional to 528,828.52, 729,763.42 and 287,105.86 is: 396,195.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,828.52 : 729,763.42 = 287,105.86 : x
  2. Step 2: Convert to fraction form
    528,828.52/729,763.42 = 287,105.86/x
  3. Step 3: Cross multiply
    528,828.52x = 729,763.42 × 287,105.86
  4. Step 4: Simplify right side
    528,828.52x = 209,519,354,295.64
  5. Step 5: Solve for x
    x = 209,519,354,295.64/528,828.52
  6. Step 6: Final answer
    x = 396,195.26

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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.