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Finding the Fourth Proportional to 720,615.29, 994,414.74 and 393,945.16

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Solution

The fourth proportional to 720,615.29, 994,414.74 and 393,945.16 is: 543,625.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,615.29 : 994,414.74 = 393,945.16 : x
  2. Step 2: Convert to fraction form
    720,615.29/994,414.74 = 393,945.16/x
  3. Step 3: Cross multiply
    720,615.29x = 994,414.74 × 393,945.16
  4. Step 4: Simplify right side
    720,615.29x = 391,744,873,972.80
  5. Step 5: Solve for x
    x = 391,744,873,972.80/720,615.29
  6. Step 6: Final answer
    x = 543,625.54

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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.