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Finding the Fourth Proportional to 528,796.15, 729,747.16 and 287,078.53

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Solution

The fourth proportional to 528,796.15, 729,747.16 and 287,078.53 is: 396,172.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,796.15 : 729,747.16 = 287,078.53 : x
  2. Step 2: Convert to fraction form
    528,796.15/729,747.16 = 287,078.53/x
  3. Step 3: Cross multiply
    528,796.15x = 729,747.16 × 287,078.53
  4. Step 4: Simplify right side
    528,796.15x = 209,494,738,315.74
  5. Step 5: Solve for x
    x = 209,494,738,315.74/528,796.15
  6. Step 6: Final answer
    x = 396,172.97

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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.