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Finding the Fourth Proportional to 528,908.10, 793,556.55 and 213,396.90

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Solution

The fourth proportional to 528,908.10, 793,556.55 and 213,396.90 is: 320,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,908.10 : 793,556.55 = 213,396.90 : x
  2. Step 2: Convert to fraction form
    528,908.10/793,556.55 = 213,396.90/x
  3. Step 3: Cross multiply
    528,908.10x = 793,556.55 × 213,396.90
  4. Step 4: Simplify right side
    528,908.10x = 169,342,507,744.70
  5. Step 5: Solve for x
    x = 169,342,507,744.70/528,908.10
  6. Step 6: Final answer
    x = 320,173.78

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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.