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Finding the Fourth Proportional to 492,462.82, 679,442.34 and 388,768.28

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Solution

The fourth proportional to 492,462.82, 679,442.34 and 388,768.28 is: 536,376.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,462.82 : 679,442.34 = 388,768.28 : x
  2. Step 2: Convert to fraction form
    492,462.82/679,442.34 = 388,768.28/x
  3. Step 3: Cross multiply
    492,462.82x = 679,442.34 × 388,768.28
  4. Step 4: Simplify right side
    492,462.82x = 264,145,627,941.65
  5. Step 5: Solve for x
    x = 264,145,627,941.65/492,462.82
  6. Step 6: Final answer
    x = 536,376.79

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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.