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Finding the Fourth Proportional to 680,981.31, 939,778.30 and 422,999.54

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Solution

The fourth proportional to 680,981.31, 939,778.30 and 422,999.54 is: 583,754.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,981.31 : 939,778.30 = 422,999.54 : x
  2. Step 2: Convert to fraction form
    680,981.31/939,778.30 = 422,999.54/x
  3. Step 3: Cross multiply
    680,981.31x = 939,778.30 × 422,999.54
  4. Step 4: Simplify right side
    680,981.31x = 397,525,787,956.01
  5. Step 5: Solve for x
    x = 397,525,787,956.01/680,981.31
  6. Step 6: Final answer
    x = 583,754.33

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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.