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Finding the Fourth Proportional to 492,745.91, 679,744.91 and 318,256.12

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Solution

The fourth proportional to 492,745.91, 679,744.91 and 318,256.12 is: 439,035.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,745.91 : 679,744.91 = 318,256.12 : x
  2. Step 2: Convert to fraction form
    492,745.91/679,744.91 = 318,256.12/x
  3. Step 3: Cross multiply
    492,745.91x = 679,744.91 × 318,256.12
  4. Step 4: Simplify right side
    492,745.91x = 216,332,972,656.34
  5. Step 5: Solve for x
    x = 216,332,972,656.34/492,745.91
  6. Step 6: Final answer
    x = 439,035.55

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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.