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Finding the Fourth Proportional to 492,279.63, 679,472.29 and 320,625.34

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Solution

The fourth proportional to 492,279.63, 679,472.29 and 320,625.34 is: 442,545.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,279.63 : 679,472.29 = 320,625.34 : x
  2. Step 2: Convert to fraction form
    492,279.63/679,472.29 = 320,625.34/x
  3. Step 3: Cross multiply
    492,279.63x = 679,472.29 × 320,625.34
  4. Step 4: Simplify right side
    492,279.63x = 217,856,036,525.96
  5. Step 5: Solve for x
    x = 217,856,036,525.96/492,279.63
  6. Step 6: Final answer
    x = 442,545.30

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1.5x scale

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.