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Finding the Fourth Proportional to 528,072.90, 792,109.35 and 291,876.90

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Solution

The fourth proportional to 528,072.90, 792,109.35 and 291,876.90 is: 437,815.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,072.90 : 792,109.35 = 291,876.90 : x
  2. Step 2: Convert to fraction form
    528,072.90/792,109.35 = 291,876.90/x
  3. Step 3: Cross multiply
    528,072.90x = 792,109.35 × 291,876.90
  4. Step 4: Simplify right side
    528,072.90x = 231,198,421,539.02
  5. Step 5: Solve for x
    x = 231,198,421,539.02/528,072.90
  6. Step 6: Final answer
    x = 437,815.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.