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Finding the Fourth Proportional to 528,858.70, 729,828.80 and 287,141.44

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Solution

The fourth proportional to 528,858.70, 729,828.80 and 287,141.44 is: 396,257.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,858.70 : 729,828.80 = 287,141.44 : x
  2. Step 2: Convert to fraction form
    528,858.70/729,828.80 = 287,141.44/x
  3. Step 3: Cross multiply
    528,858.70x = 729,828.80 × 287,141.44
  4. Step 4: Simplify right side
    528,858.70x = 209,564,092,585.47
  5. Step 5: Solve for x
    x = 209,564,092,585.47/528,858.70
  6. Step 6: Final answer
    x = 396,257.25

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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.