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Finding the Fourth Proportional to 863,640.12, 1,295,607.84 and 294,990

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Solution

The fourth proportional to 863,640.12, 1,295,607.84 and 294,990 is: 442,535.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,640.12 : 1,295,607.84 = 294,990 : x
  2. Step 2: Convert to fraction form
    863,640.12/1,295,607.84 = 294,990/x
  3. Step 3: Cross multiply
    863,640.12x = 1,295,607.84 × 294,990
  4. Step 4: Simplify right side
    863,640.12x = 382,191,356,721.60
  5. Step 5: Solve for x
    x = 382,191,356,721.60/863,640.12
  6. Step 6: Final answer
    x = 442,535.44

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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.