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Finding the Fourth Proportional to 528,941.67, 729,940.98 and 287,228.28

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Solution

The fourth proportional to 528,941.67, 729,940.98 and 287,228.28 is: 396,375.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,941.67 : 729,940.98 = 287,228.28 : x
  2. Step 2: Convert to fraction form
    528,941.67/729,940.98 = 287,228.28/x
  3. Step 3: Cross multiply
    528,941.67x = 729,940.98 × 287,228.28
  4. Step 4: Simplify right side
    528,941.67x = 209,659,690,683.63
  5. Step 5: Solve for x
    x = 209,659,690,683.63/528,941.67
  6. Step 6: Final answer
    x = 396,375.83

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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.