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Finding the Fourth Proportional to 863,920.31, 1,296,129.20 and 264,969.32

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Solution

The fourth proportional to 863,920.31, 1,296,129.20 and 264,969.32 is: 397,530.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,920.31 : 1,296,129.20 = 264,969.32 : x
  2. Step 2: Convert to fraction form
    863,920.31/1,296,129.20 = 264,969.32/x
  3. Step 3: Cross multiply
    863,920.31x = 1,296,129.20 × 264,969.32
  4. Step 4: Simplify right side
    863,920.31x = 343,434,464,950.65
  5. Step 5: Solve for x
    x = 343,434,464,950.65/863,920.31
  6. Step 6: Final answer
    x = 397,530.26

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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.