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Finding the Fourth Proportional to 492,512.79, 679,638.36 and 285,765.22

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Solution

The fourth proportional to 492,512.79, 679,638.36 and 285,765.22 is: 394,339.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,512.79 : 679,638.36 = 285,765.22 : x
  2. Step 2: Convert to fraction form
    492,512.79/679,638.36 = 285,765.22/x
  3. Step 3: Cross multiply
    492,512.79x = 679,638.36 × 285,765.22
  4. Step 4: Simplify right side
    492,512.79x = 194,217,005,465.84
  5. Step 5: Solve for x
    x = 194,217,005,465.84/492,512.79
  6. Step 6: Final answer
    x = 394,339.01

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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.