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Finding the Fourth Proportional to 528,896.70, 729,878.32 and 287,179.74

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Solution

The fourth proportional to 528,896.70, 729,878.32 and 287,179.74 is: 396,308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,896.70 : 729,878.32 = 287,179.74 : x
  2. Step 2: Convert to fraction form
    528,896.70/729,878.32 = 287,179.74/x
  3. Step 3: Cross multiply
    528,896.70x = 729,878.32 × 287,179.74
  4. Step 4: Simplify right side
    528,896.70x = 209,606,266,169.24
  5. Step 5: Solve for x
    x = 209,606,266,169.24/528,896.70
  6. Step 6: Final answer
    x = 396,308.52

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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.